Question

what force must be exerted on a 0.145 kg baseball in order to give it an acceleration of 130 m/s²?
a 18.9 n
b 129.9 n
c 130 n
d 130.2 n

Explanation:

Step1: Recall Newton's second law

Newton's second law is \(F = ma\), where \(F\) is the force, \(m\) is the mass, and \(a\) is the acceleration.

Step2: Substitute the given values

Given \(m = 0.145\space kg\) and \(a=130\space m/s^{2}\). Substitute into \(F = ma\), so \(F=(0.145\space kg)\times(130\space m/s^{2})\).

Step3: Calculate the force

\(F = 0.145\times130=18.85\approx18.9\space N\)

Answer:

A. \(18.9\space N\)