Question

a ball is thrown downward from the top of roof with a speed of 25 m/s. after 2 s, its velocity will be:

Answer 1

Answer:

12.5

Explanation:

first, v=d/t

      v=25/2

      v=12.5

Answer 2

The final velocity of the ball is 44.6 m/s.

The given parameters;

• initial velocity of the ball, u = 25 m/s
• time of motion of the ball, t = 2 s

The velocity of the ball increases as the ball moves downward and it will become maximum before the ball hits the ground.

This velocity is known as the final velocity of the ball.

The final velocity of the ball is calculated as follows;

v = u + gt

where;

• v is the final velocity of the ball
• g is the acceleration due t gravity = 9.8 m/s²

v = 25 + 9.8(2)

v = 44.6 m/s

Thus, the final velocity of the ball is 44.6 m/s.

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