Question

a ball has a mass of 140 g. what is the force needed to accelerate the ball at 25 m/s²? (formula: f = ma)
3.5 n
115 n
165 n
4.5 n

Explanation:

Step1: Convert mass to kg

The mass $m = 140\ g=0.14\ kg$ (since $1\ kg = 1000\ g$).

Step2: Apply the force - mass - acceleration formula

Given $a = 25\ m/s^{2}$ and using $F=ma$, we substitute the values: $F=(0.14\ kg)\times(25\ m/s^{2})$.
$F = 3.5\ N$.

Answer:

A. 3.5 N