Question

Brant pushes a toy car with a force of 50 N. The force of friction as the car moves is 5 N. What is the net force on the car?

a. 55 N
b. 45 N
c. 50 N
d. 10 N

Answer 1

net force= the sum of all the forces acting on the object

the frictional force is opposite to the direction of motion of the object

If the object moves to the right (positive) then the friction force moves to the left (negative).

so the net force: 50 N - 5 N = 45 N (B)