Question

2. An object is thrown vertically
upward then which of these
statement is correct.

Acceleration and the velocity both
are in upward direction

acceleration is in upward direction
and velocity is in downward
direction.

Acceleration and the velocity both
are in downward direction.

Acceleration is in downward
direction and velocity is in upward
direction.​

Answer 1

Explanation:

Ball is moving under the effect of gravitational acceleration , which is always acting vertically downwards so it is negative.

Answer 2

Acceleration is in downward direction and velocity is in upward direction.

• Let's assume that initial velocity which the ball was thrown upwards be 'u'.

• Now, when the ball is rising up, the direction of velocity vector is upwards.

• However, with increasing height, simultaneous decrease in the velocity of the ball. This is due to gravitational acceleration (g = 9.8 m/s²) directed downwards.

• So, acceleration vector is directed opposite to the velocity vector of the ball.

• So, when the ball reaches the topmost point, its velocity becomes zero but its acceleration still remains 9.8 m/s² downwards.

$\star$ Hope It Helps.