Question

Ball A is projected vertically upwards at a velocity of 16m.s-¹ fron the ground. ignore the effects of air friction. use the ground as zero reference. a) calculate the time taken by ball A to return to the ground. b) draw a velocity time graph for ball A​

Answer 1

Answer: 3.26 s

Step-by-step explanation:

Given

The ball is projected upward with a velocity
`u=16\ m/s`

Using the equation of motion

`s=ut+(1)/(2)at^2`

Here, displacement is zero as the ball returns to its initial position

`\Rightarrow 0=16* t-0.5* g* t^2\\\Rightarrow t(16-0.5* 9.8* t)=0\\\text{i.e.}\ t=(16)/(4.9)=3.26\ s`

the velocity of the ball at any instant is given by

`v=u+at\\v=16-9.8t`