Motion quiz

If the initial velocity of an object is equal to it's final velocity, the value of acceleration is

• Positive

• Negative

• Zero

• Infinite

Which of the following is of non-uniform acceleration?

• The motion of a bicycle going down the slope of a road when the rider is not peddling and wind resistance is negligible.

• The motion of a ball rolling down an inclined plane.

• The motion of a freely falling body.

• The movement of a car in a crowded road

If a car initially at rest accelerates uniformly at a speed of 144 km/h in 20s. It covers a distance of

• 20 cm

• 400 m

• 1440 cm

• 2980 cm

A particle covers half of a circle of radius r. Then the displacement and distance of the particle are respectively

• 2pr, 0

• 2r, pr

• Pr/2, 2r

• Pr, r

If a particle moves with a constant speed, the distance-time graph is a

• Straight line

• Circle

• Stair-like

• Polygon

The magnitude of average velocity .......... equal to the average speed.

Distance travelled divided by elapsed time gives.................

When negative acceleration acts on a moving body its

velocity ..............

A body moving with a uniform speed along a circle has............. Velocity

The speed-time graph of a moving object is a straight

line parallel to the time-axis. It means the speed is ........