Q14 of 18 Page 326

Define free fall.


Whenever an object falls under the effect of gravitational force towards the earth, it is said to be under free fall.

The direction of motion of the object does not change during free fall. But due to the acceleration due to gravity, the velocity of object changes.

More from this chapter

All 18 →
12

(a) A book has a mass 400 g. Find its weight when taken from the surface to a height equal to the radius of the earth.
(b) Define weight.

 13

A car falls off a ledge and drops to the ground in 0.5 seconds.

Let g = 10 ms-2, then


(a) What is its speed on striking the ground?


(b) What is its average speed during 0.5 second?


(c) how high is the ledge from the ground?

 14

State the equations of free fall.

 14

Find the velocity with which a ball is thrown up if it reaches the maximum height in 5s. Also find its maximum height.