Question

John is pushing a wheelbarrow filled with sand on a building site.The total mass of the wheelbarrow and it's contents is 30kg.When he applies a force of 20N, the wheelbarrow moves forward at a constant speed.
The foremn shouts at John to hurry up , and he increases his pushing force to 50N

Calculate the wheelbarrows acceleration.

Answer 1

the additional 30 N force, accelerates the the 30 kg wheelbarrow at 1 m/s^2

a = f / m = 30 n / 30 kg