Q1. Odometer of an automobile measures speed.
- True
- False
- Q2. A quantity which has only magnitude is known as
- displacement
- vector quantity
- scalar quantity
- moving body
- Q3. The acceleration of an object moving in a straight line can be determined from the
- Slope of the distance-time graph
- Area between the distance-time graph and time axis
- Slope of the velocity-time graph
- Area between the velocity-time graph and time axis
- Q4. Rate of change of displacement is called speed.
- True
- False
- Q5. The SI unit of velocity is meter /second
- True
- False
- Q6. The velocity-time graph of an object moving with variable velocity and uniform retardation is a straight line sloping downwards.
- True
- False
- Q7. The speed at any instant of time is known as average speed.
- True
- False
- Q8. How far will a jeep travel in 2 hours at 20 m/s?
- 144 km
- 158 km
- 168 km
- 234 km
- Q9. Displacement of a moving object is a vector quantity.
- True
- False
- Q10. If car A is travelling at the speed of 80 km/h and car B at 60 km/h in the same direction, what is the velocity of the car A relative to the car B?
- 10 km/h
- 20 km/h
- 30 km/h
- 40 km/h
- Q11. The velocity–time graph of a body having uniform acceleration is a straight line.
- True
- False
- Q12. The velocity-time graph of an object moving with variable velocity and variable acceleration is a straight line.
- True
- False
- Q13. A ball is gently dropped from a height of 15 m. If its velocity increases uniformly at the rate of 10 m/s2, the velocity with which it will strike the ground is
- 15 m/s
- 17.3 m/s
- 10 m/s
- 5.8 m/s
- Q14. A car increases its speed from 20 km/h to 40 km/h in 10 seconds. Find its acceleration.
- (5/9) m/s2
- 2 m/s2
- (–5/9) m/s2
- –2 m/s2
- Q15. If the upward direction is taken as positive then what will be the sign of velocity and acceleration when a body falls freely from a height.
- Positive acceleration and positive velocity
- Negative acceleration and negative velocity
- Positive acceleration and negative velocity
- Negative acceleration and positive velocity.
- Q16. The final displacement of a body travelling along a zig-zag path is obtained by measuring the length of the path covered.
- True
- False
- Q17. The unit of speed is m/s.
- True
- False
- Q18. The velocity-time graph of a body moving with zero acceleration is a straight line parallel to y-axis, that is, velocity axis.
- True
- False
- Q19. The velocity-time graph of a body moving with uniform velocity is a straight line parallel to the time axis.
- True
- False
- Q20. An object completes one round of a circle of radius 7 m in 20 seconds. Distance travelled after 10 seconds is
- 22 m
- 24 m
- 26 m
- 28 m
- Q21. A bus decelerating with 4m/s2changes its speed from 60 m s-1 to a certain value in 5 s. Calculate its final speed.
- 25 m/s
- 40 m/s
- 60 m/s
- 30 m/s
- Q22. 30 m/s, South is a measure of velocity.
- True
- False
- Q23. Choose the correct option.
- Distance is a vector, velocity is a vector, acceleration is a vector.
- Distance is a vector, velocity is a scalar, acceleration is a vector.
- Distance is a scalar, velocity is a vector, acceleration is a scalar.
- Distance is a scalar, velocity is a vector, acceleration is a vector.
- Q24. Speed is a vector quantity.
- True
- False
- Q25. Which of the following is a correct measure of velocity?
- 30 s
- 30 South
- 30 m/s
- 30 m/s, South
- Q26. The speed-time graph for a particle moving at constant speed is a straight-line ________ to the time axis.
- parallel
- perpendicular
- aligned
- inclined
- Q27. A body starts to slide over a horizontal surface with an initial velocity of 0.2 m/s. Due to friction, its velocity decreases at the rate of 0.02 m/s2. How much time will it take for the body to stop?
- 1 s
- 5 s
- 10 s
- 15 s
- Q28. Distance covered by a body from velocity-time graph is
- Area under the graph .
- Is denoted by a line parallel to the time axis at any point on the distance axis.
- Equal to the slope of the graph.
- Is denoted by a line parallel to the distance axis at any point on the time axis.
- Q29. A quantity has a value of -16 m/s2. What does it represent?
- Speed of an object
- Velocity of an object
- Acceleration of an object
- Retardation of an object
- Q30. the motion of a ball rolling down an inclined plane is an example of uniformly accelerated motion.
- True
- False
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