Question

A football is kicked into the air vertically upwards. What is its (a) acceleration, and (b) velocity at the highest point?

Answer 1

when football is kicked upwards in air

net force on the football is given by

$F = mg$

now the acceleration of football is given by

$a = \frac{F}{m}$

$a = \frac{mg}{m} = g = 9.8 m/s^2$

now as it moves up its velocity will decrease due to gravity which act opposite to the motion

now as ball moves high velocity continuously decreases and finally velocity will become ZERO as it will reach at the highest point.

so velocity of football at the top position will be ZERO

Answer 2

Explanation:

a) Acceleration at the highest point (a) = -g.

b) Velocity at the highest point (v) = 0.

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