Question

Will mark the brainliest
A 4.0kg ball is thrown vertically up into the air with an initial velocity of 8.5ms −1. By the time it is height h metres above the starting point, it has a velocity of 3.0ms −1 and has done 4.0J of work against air resistance. Find h.

Answer 1

Answer:

0.1 m

Explanation:

From the question given above, the following data were obtained:

Mass (m) of ball = 4 Kg

Acceleration due to gravity (g) = 9.8 m/s²

Energy (E) = 4 J

Height (h) =?

The height (h) can be obtained by using the following formula:

E = mgh

4 = 4 × 9.8 × h

4 = 39.2 × h

Divide both side by 39.2

h = 4 / 39.2

h = 0.1 m

Thus, the value of h is 0.1 m