Question

est yourself 9:
John is pushing a wheelbarrow filled with sand on a building site. The total
mass of the wheelbarrow and its contents is 30 kg. When he applies a force
of 20 N, the wheelbarrow moves forward at a constant speed.
a) What is the magnitude of the friction between the wheels and the
ground? Explain your answer. (20 N)
The foreman shouts at John to hurry up, and he increases his pushing force
to 50 N
b) Draw a labelled free-body diagram of all the forces that act on
the wheelbarrow.
c) Calculate the wheelbarrow's acceleration. (1,0 m.s? forward)​

Answer 1

Answer:

John is pushing a wheelbarrow filled with sand on a building site. The total

mass of the wheelbarrow and its contents is 30 kg. When he applies a force

of 20 N, the wheelbarrow moves forward at a constant speed.

a) What is the magnitude of the friction between the wheels and the

ground? Explain your answer. (20 N)

The foreman shouts at John to hurry up, and he increases his pushing force

to 50 N

b) Draw a labelled free-body diagram of all the forces that act on

the wheelbarrow.

c) Calculate the wheelbarrow's acceleration. (1,0 m.s?