Question

A student throws a 0.140-kg ball straight upwards to a height of 6.40 m. How much work did the student do? answer for:___J

Answer 1

Given:

The mass of the ball is,

$m=0.140\text{ kg}$

The ball reaches the height

$h=6.40\text{ m}$

To find:

The work by the student

Explanation:

The work by the student is,

$\begin{gathered} W=mgh \\ =0.140\times9.8\times6.40 \\ =8.78\text{ J} \end{gathered}$

Hence, the work by the student is 8.78 J.