1. Which of the following is an example of periodic motion?
a) A car moving on a straight road.
b) A pendulum swinging to and fro.
c) A horse pulling a cart on a straight road.
d) A train moving on a straight bridge.
Answer: b) A pendulum swinging to and fro.
Explanation: Periodic motion is motion that repeats itself at regular intervals, like the to-and-fro motion of a pendulum.
2. What determines if an object is moving fast or slow?
a) Its color and size.
b) The distance it covers in a unit of time.
c) The noise it makes while moving.
d) Its weight and shape.
Answer: b) The distance it covers in a unit of time.
Explanation: The speed of an object, which determines if it is moving fast or slow, is calculated based on the distance it covers in a given unit of time.
3. What is the basic unit of speed in the SI system?
a) Kilometers per hour (km/h).
b) Meters per second (m/s).
c) Miles per hour (mph).
d) Feet per second (ft/s).
Answer: b) Meters per second (m/s).
Explanation: In the SI (International System of Units), the basic unit of speed is meters per second (m/s).
4. Which of these is an example of non-uniform motion?
a) A fan rotating at constant speed.
b) A vehicle moving in a straight line with changing speed.
c) The Earth revolving around the Sun at a constant speed.
d) A train moving on a straight track at a constant speed.
Answer: b) A vehicle moving in a straight line with changing speed.
Explanation: Non-uniform motion refers to motion where the speed is not constant. A vehicle moving in a straight line with changing speed is an example of non-uniform motion.
5. What is the time period of a pendulum?
a) The time it takes to complete one full oscillation.
b) The time it takes to come to a stop.
c) The time it takes to move from the mean position to one extreme.
d) The time it takes to move from one extreme to the mean position.
Answer: a) The time it takes to complete one full oscillation.
Explanation: The time period of a pendulum is the time taken by the pendulum to complete one full oscillation, i.e., from one extreme position back to the same position.
6. If a car covers a distance of 150 kilometers in 3 hours, what is its speed?
a) 50 km/h.
b) 100 km/h.
c) 45 km/h.
d) 60 km/h.
Answer: a) 50 km/h.
Explanation: Speed is calculated as distance divided by time. Here, 150 km/3h=50 km/h.
7. What is a speedometer used for in a vehicle?
a) To measure the distance covered by the vehicle.
b) To measure the speed of the vehicle.
c) To measure the time taken by the vehicle to cover a distance.
d) To measure the fuel efficiency of the vehicle.
Answer: b) To measure the speed of the vehicle.
Explanation: A speedometer is an instrument in vehicles that measures and displays the instantaneous speed.
8. Which of these graphs would represent the motion of a car parked on a side road?
a) A straight horizontal line parallel to the time axis.
b) A straight line inclined to the time axis.
c) A curved line.
d) A zigzag line.
Answer: a) A straight horizontal line parallel to the time axis.
Explanation: In a distance-time graph, a car parked on a side road (not moving) would be represented by a straight horizontal line parallel to the time axis, indicating no change in distance over time.
9. What is the time period of a simple pendulum? a) The duration of one complete to and fro motion. b) The time it takes to reach its highest point. c) The duration of motion from the mean position to one extreme. d) The time it takes to stop after release. Answer: a) The duration of one complete to and fro motion. Explanation: The time period of a simple pendulum is the duration of time it takes to complete one full cycle of to and fro motion.
10. Which of these is an example of oscillatory motion? a) A car racing on a track. b) A pendulum swinging back and forth. c) A boat sailing in a straight line. d) An airplane taking off. Answer: b) A pendulum swinging back and forth. Explanation: Oscillatory motion is a motion that moves back and forth in a regular cycle, like the swinging of a pendulum.
11. If a cyclist covers a distance of 15 km in 30 minutes, what is their speed? a) 30 km/h. b) 15 km/h. c) 45 km/h. d) 60 km/h. Answer: a) 30 km/h. Explanation: Speed is calculated as distance divided by time. Here, 15 km0.5 h=30 km/h0.5 h15 km=30 km/h.
12. What does the slope of a distance-time graph represent? a) The acceleration of the object. b) The speed of the object. c) The weight of the object. d) The potential energy of the object. Answer: b) The speed of the object. Explanation: In a distance-time graph, the slope represents the speed of the object. A steeper slope indicates a higher speed.
13. A car travels 100 km in 2 hours. What is its average speed? a) 50 km/h. b) 100 km/h. c) 150 km/h. d) 200 km/h. Answer: a) 50 km/h. Explanation: The average speed is calculated as the total distance traveled divided by the total time taken. Here, 100 km2 h=50 km/h2 h100 km=50 km/h.
14. Which unit is typically used for measuring the speed of a vehicle? a) Meters per second (m/s). b) Kilometers per hour (km/h). c) Miles per hour (mph). d) Feet per second (ft/s). Answer: b) Kilometers per hour (km/h). Explanation: While meters per second is the SI unit of speed, kilometers per hour is commonly used to measure the speed of vehicles.
15. What kind of motion does the Earth around the Sun exhibit? a) Linear motion. b) Oscillatory motion. c) Circular motion. d) Random motion. Answer: c) Circular motion. Explanation: The motion of the Earth around the Sun is an example of circular motion.
16. If a train moves at a constant speed of 60 km/h, how much distance will it cover in 1.5 hours? a) 40 km. b) 90 km. c) 120 km. d) 60 km. Answer: b) 90 km. Explanation: If the train’s speed is 60 km/h, in 1.5 hours it will cover 60 km/h×1.5 h=90 km60 km/h×1.5 h=90 km.
17. Which of the following is a unit for measuring time? a) Meter b) Second c) Kilogram d) Litre Answer: b) Second Explanation: The second is the base unit of time in the International System of Units (SI).
18. What type of motion is displayed by the hands of an athlete during a race? a) Straight-line motion b) Circular motion c) Oscillatory motion d) Random motion Answer: b) Circular motion Explanation: The motion of the hands of an athlete during a race is circular as they move in a circular path.
19. If an object covers a distance of 400 meters in 20 seconds, what is its speed? a) 20 m/s b) 40 m/s c) 10 m/s d) 5 m/s Answer: a) 20 m/s Explanation: Speed is calculated by dividing the distance by time. Here, 400 m20 s=20 m/s20 s400 m=20 m/s.
20. Which instrument is used to measure short time intervals? a) Barometer b) Speedometer c) Stopwatch d) Thermometer Answer: c) Stopwatch Explanation: A stopwatch is used to measure short time intervals, such as in sports and laboratory experiments.
21. How is the speed of a moving object at a particular instant measured? a) Average speed b) Instantaneous speed c) Uniform speed d) Variable speed Answer: b) Instantaneous speed Explanation: Instantaneous speed is the speed of a moving object at a particular instant of time.
22. What is the average speed of a car that travels 150 km in 3 hours? a) 50 km/h b) 100 km/h c) 150 km/h d) 200 km/h Answer: a) 50 km/h Explanation: The average speed is calculated by dividing the total distance traveled by the total time taken. Here, 150 km3 h=50 km/h3 h150 km=50 km/h.
23. If a pendulum completes 40 oscillations in 80 seconds, what is its time period? a) 1 second b) 2 seconds c) 40 seconds d) 80 seconds Answer: b) 2 seconds Explanation: The time period of a pendulum is the time taken for one complete oscillation. Here, 80 s40=2 s4080 s=2 s per oscillation.
24. What does a distance-time graph for an object moving with constant speed look like? a) A straight line parallel to the time axis b) A straight line inclined to the time axis c) A curved line d) A zigzag line Answer: b) A straight line inclined to the time axis Explanation: In a distance-time graph, an object moving with constant speed is represented by a straight line inclined to the time axis, indicating a constant change in distance over time.
25. What does the slope of a distance-time graph indicate when it becomes steeper? a) The object is slowing down. b) The object is moving at a constant speed. c) The object is accelerating or speeding up. d) The object is stationary. Answer: c) The object is accelerating or speeding up. Explanation: A steeper slope in a distance-time graph indicates an increase in speed, meaning the object is accelerating.
26. If a cyclist travels a distance of 5 km in 10 minutes, what is their speed in km/h? a) 30 km/h b) 20 km/h c) 10 km/h d) 5 km/h Answer: a) 30 km/h Explanation: First convert time to hours: 10 minutes = 10606010 hours = 1661 hour. Then calculate speed: 5 km16 h=30 km/h61 h5 km=30 km/h.
27. Which unit is commonly used for measuring the speed of an aircraft? a) Kilometers per hour (km/h) b) Meters per second (m/s) c) Miles per hour (mph) d) Knots Answer: d) Knots Explanation: For aircraft, speed is often measured in knots. One knot equals one nautical mile per hour.
28. What kind of motion is exhibited by a child on a see-saw? a) Linear motion b) Circular motion c) Oscillatory motion d) Random motion Answer: c) Oscillatory motion Explanation: A child on a see-saw exhibits oscillatory motion, moving back and forth from a fixed point.
29. If a vehicle travels at a constant speed of 60 km/h, how much distance would it cover in 1.5 hours? a) 40 km b) 60 km c) 90 km d) 120 km Answer: c) 90 km Explanation: Distance = Speed × Time. So, 60 km/h×1.5 h=90 km60 km/h×1.5 h=90 km.
30. What does a straight horizontal line on a distance-time graph indicate? a) The object is moving at a constant speed. b) The object is accelerating. c) The object is decelerating. d) The object is stationary. Answer: d) The object is stationary. Explanation: A straight horizontal line on a distance-time graph indicates that the object is not changing its position with respect to time, meaning it is stationary.
31. What is the time period of a clock’s pendulum if it takes 40 seconds to complete 20 oscillations? a) 1 second b) 2 seconds c) 20 seconds d) 40 seconds Answer: b) 2 seconds Explanation: The time period is the time taken for one oscillation. Here, 40 s20=2 s2040 s=2 s per oscillation.
32. If the distance-time graph of an object is a straight line parallel to the time axis, then the object is: a) Moving at a constant speed. b) Accelerating. c) Decelerating. d) Stationary. Answer: d) Stationary. Explanation: A distance-time graph that is a straight line parallel to the time axis indicates that the object’s position is not changing with time, meaning it is stationary.
33. What does a distance-time graph of an object moving with a constant speed look like? a) A straight line inclined to the time axis. b) A curved line. c) A horizontal line parallel to the time axis. d) A vertical line. Answer: a) A straight line inclined to the time axis. Explanation: For an object moving at constant speed, the distance-time graph is a straight line inclined to the time axis, indicating a uniform increase in distance over time.
34. If a train takes 5 hours to travel 300 kilometers, what is its average speed? a) 60 km/h. b) 55 km/h. c) 65 km/h. d) 50 km/h. Answer: a) 60 km/h. Explanation: Average speed is calculated as the total distance divided by total time. Here, 300 km5 h=60 km/h5 h300 km=60 km/h.
35. Which of the following is an example of straight-line motion? a) The revolution of the moon around the Earth. b) A car moving on a straight road. c) The movement of a swing. d) The rotation of a windmill. Answer: b) A car moving on a straight road. Explanation: A car moving on a straight road is an example of straight-line motion.
36. What is the SI unit of distance? a) Kilometer (km). b) Meter (m). c) Centimeter (cm). d) Mile (mi). Answer: b) Meter (m). Explanation: The meter is the base unit of distance in the International System of Units (SI).
37. How is time typically measured for very short durations, like in sports? a) In hours. b) In seconds. c) In minutes. d) In milliseconds. Answer: d) In milliseconds. Explanation: For very short durations, especially in sports, time is often measured in milliseconds (one-thousandth of a second).
38. Which of these is not a function of a speedometer? a) Measuring the distance traveled by a vehicle. b) Measuring the instantaneous speed of a vehicle. c) Indicating the fuel level in a vehicle. d) Showing the speed in kilometers per hour or miles per hour. Answer: c) Indicating the fuel level in a vehicle. Explanation: A speedometer is used for measuring the instantaneous speed of a vehicle and showing it in km/h or mph, but not for indicating the fuel level.
39. If a bird flies 120 meters in 8 seconds, what is its speed? a) 10 m/s. b) 15 m/s. c) 20 m/s. d) 25 m/s. Answer: b) 15 m/s. Explanation: Speed is calculated by dividing the distance by the time. Here, 120 m8 s=15 m/s8 s120 m=15 m/s.
40. What does a steep slope on a distance-time graph represent? a) Low speed. b) High speed. c) Constant speed. d) No movement. Answer: b) High speed. Explanation: A steeper slope on a distance-time graph indicates a higher speed because it shows that a greater distance is covered in a given time.