Question

a racecar increases its speed from 35 m/s to 45 m/s in 10 s. it has a mass of 500 kg. what force did it use to do this?

Explanation:

Step1: Calculate acceleration

Acceleration \(a=\frac{v - u}{t}\), where \(v = 45\ m/s\), \(u = 35\ m/s\), \(t=10\ s\).
\(a=\frac{45 - 35}{10}=\frac{10}{10}=1\ m/s^{2}\)

Step2: Calculate force

Using Newton's second law \(F = ma\), where \(m = 500\ kg\), \(a = 1\ m/s^{2}\).
\(F=500\times1 = 500\ N\)

Answer:

\(500\ N\)