Answer to Question #246550 in Physics for Jossy

Question

What change in velocity would produce a body of mass 4Kg if a constant force of 16N acts on it for 2 seconds

Answer 1

Applying the second Newton's law (for constant force), obtain:

$$m\dfrac{\Delta v}{\Delta t} = F$$

where $m = 4kg, \Delta t =2s, F=16N$ and $\Delta v$ is the required change in velocity.

Thus, obtain:

$$\Delta v = \dfrac{F\Delta t}{m}\\ \Delta v = \dfrac{16N\cdot 2s}{4kg} = 8m/s$$

Answer. 8m/s.