Question

A ball is projected vertically upwards its acceleration at highest point
1.zero
2.equal to velocity
3.directed towards velocity
4.equal to 9.8​

Answer 1

Option 4 is correct because the motion of the ball depends upon the gravitational acceleration at each point of its path.

At the highest point the velocity of the ball becomes zero, not acceleration.

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Hope it was helpful.

Answer 2

Answer:

$a=9.8\ m/s^2$

Explanation:

We know that the acceleration of an object is given by :

$a=\dfrac{dv}{dt}$

i.e. acceleration is equal to the rate of change of velocity

We know that when a ball is projected vertically upwards, at the highest point the velocity of the ball is equal to zero. If the velocity is zero, its acceleration becomes constant.

So, at the highest point the acceleration at highest point is equal to 9.8 meters per second square. Hence, the correct option is (4).