Suppose a force of 51 newtons is applied to an object with mass of 17 kilograms initally at rest How fast will it be moving 5 seconds later?

Answer 1

We have to suppose that the 51 Newtons is the only force acting on the mass in question.

F = m A

A = F / m = 51/17 = 3 meters per second2

V = A t = (3 x 5) = 15 meters per second.

Answer 2

Using the equation F=ma, we can calculate the acceleration of the object to be 3 m/s^2. After 5 seconds, the object will be moving at a speed of 15 m/s (v = u + at, where u = 0).