Physics Quiz Force and laws of motion

1.In which of the following cases of motions, the distance moved and the magnitude of displacement are equal?

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• (a) If the car is moving on a straight road

• (b) If the car is moving in Circular path

• (c) The pendulum is moving to and fro

• (d) The earth is revolving around the sun

2. A boy goes from A to B with a velocity of 20 m/min and comes back from B to A with a velocity of 30 m/min. The average velocity of the boy during the whole journey is

• (a) 24 m/min

• (b) 25 m/s

• (c) Zero

• (d) 20 m/min

According to the given velocity-time graph, the object

• (a) is moving with uniform velocity

• (b) has some initial velocity

• (c) is moving uniformly with some initial velocity

• (d) is at rest

The ratio of speed to the magnitude of velocity when the body is moving in one direction is

• (a) Less than one

• (b) Greater than one

• (c) Equal to one

• (d) Greater than or equal to one

Which of the following situations is possible?

• (a) An object can have acceleration, but constant velocity.

• (b) The velocity of an object may be zero but acceleration is not zero.

• (c) Distance and the magnitude of displacement are equal in circular motion.

• (d) Average speed and the magnitude of average velocity are always equal in circular motion.

Which of the following statement is correct regarding velocity and speed of a moving body?

• (a) Velocity of a moving body is always higher than its speed

• (b) Speed of a moving body is always higher than its velocity

• (c) Speed of a moving body is its velocity in a given direction

• (d) Velocity of a moving body is its speed in a given direction

A car of mass 1000 kg is moving with a velocity of 10 m/s. If the velocity-time graph for this car is a horizontal line parallel to the time axis, then the velocity of the car at the end of 25 s will be:

• (a) 40 m/s

• (b) 25 m/s

• (c) 10 m/s

• (d) 250 m/s

A car is travelling at a speed of 90 km/h. Brakes are applied so as to produce a uniform acceleration of – 0.5 m/s². Find how far the car will go before it is brought to rest?

• (a) 8100 m

• (b) 900 m

• (c) 625 m

• (d) 620 m

Four cars A, B, C and D are moving on a levelled, straight road. Their distance time graphs are shown in the figure above. Which of the following is the correct statement regarding the motion of these cars?

• (a) Car A is faster than car D

• (b) Car B is the slowest

• (c) Car D is faster than car C

• (d) Car C is the slowest

Area under a v – t graph represents a physical quantity which has the unit

• (a) m^2

• (b) m

• (c) m³

• (d) m s^–1