Question

A force of 80 N is exerted on an object on a frictionless surface for a distance of 4 meters. If the object has a mass of 10 kg, calculate its velocity

Answer 1

V = 8 m/s

Explanation:

Assuming that the object was at rest, so μ = 0

Equations

F=ma - Newtons 2nd law

`v^(2) = u^(2) + 2a`Δx - 4th kinematic equatioin

Step 1 - find "a"

F=m/a

a=F/m

a=80/10

a=8m/s^2

Step 2 - find "v"

v^2 = 0 + 2 * 8 * 4

v^2 = 64

v=8m/s