Free Fall Motion Quiz

An object is dropped from a height and is about to hit the ground (just before impact). Neglecting air resistance, what is its acceleration at that moment?

• 0 m/s²

• 9.8 m/s² upward

• 9.8 m/s² downward

• Decreasing to zero

• Equal to its velocity

The velocity of a ball that is dropped from rest after 2 seconds is ....

• 5 m/s

• 10 m/s

• 15 m/s

• 20 m/s

• 40 m/s

The time required for two objects of different masses dropped simultaneously from the same height in a vacuum is....

• Greater for the heavier object

• Greater for the lighter object

• The same for both objects

• Dependent on their shapes

• Proportional to their masses

The velocity of a freely falling object after 3 seconds is....

• 10 m/s

• 20 m/s

• 30 m/s

• 40 m/s

• 90 m/s

The distance traveled by an object in free fall during 4 seconds is….

• 20 m

• 40 m

• 60 m

• 80 m

• 100 m

The time required for an object to fall from a height of 45 m is ....

• 2 s

• 3 s

• 4 s

• 5 s

• 6 s

The reason the distance covered during the last second of free fall is greater than during the first second is ….

• Gravity increases with time

• Velocity increases due to constant acceleration

• Mass increases

• Acceleration increases

• Air resistance becomes zero

The height from which an object is dropped if it reaches a velocity of 50 m/s just before hitting the ground is ....

• 100 m

• 125 m

• 150 m

• 200 m

• 250 m

The shape of the velocity–time graph for an object in ideal free fall (downward taken as positive) is ....

• A horizontal straight line

• A straight line with positive slope

• A straight line with negative slope

• A curve opening upward

• A parabola

The ratio of the falling times of two objects dropped from heights h and 4h, respectively, is….

• 1 : 4

• 2 : 1

• 1 : 2

• 2 : 2

• 4 : 1