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
45 n

Explanation:

Step1: Convert mass to kg

First, convert 140 g to kg. Since 1 kg = 1000 g, then $m = 140\div1000=0.14$ kg.

Step2: Apply force - mass - acceleration formula

Use the formula $F = ma$, where $m = 0.14$ kg and $a = 25$ m/s². So $F=0.14\times25 = 3.5$ N.

Answer:

A. 3.5 N