Question

A car of force 250N acts for 20s.what is the impulse?

Answer 1

By definition, impulse of a constant force is given as follows:

$$J = F\Delta t$$

where $F = 250N$ is the force that acts during the time $\Delta t = 20s$. Thus, obtain:

$$J = 250N\cdot 20s = 5000N\cdot s = 5000kg\cdot m/s$$

Answer. $5000\space kg\cdot m/s$.