Question

when a 45 n object falls to the ground from a height of 4.6 m. how much work is done by the force of gravity?
a 304 nm
b 416 nm
c 207 nm

Explanation:

Step1: Recall Work Formula

Work \( W \) done by a force \( F \) over distance \( d \) (when force and displacement are in same direction) is \( W = F \times d \).

Step2: Identify Values

Force due to gravity \( F = 45 \, \text{N} \), distance (height) \( d = 4.6 \, \text{m} \).

Step3: Calculate Work

Substitute into formula: \( W = 45 \times 4.6 \).
\( 45 \times 4.6 = 207 \, \text{Nm} \).

Answer:

c. 207 Nm