Astudent pushes a 50 kg box of books on a flat surface with a force of 120 n at an angle of 60° on the horizontal. if the surface is friction free, how far does the box move in 5 seconds assuming it started moving from rest? a. 6.0 m
b. 8.5 m
c. 15 m
d. 4.6 m

c. 15 m

Explanation:

We apply Newton's second law in the x direction:

∑Fₓ = m*a

120*cos(60°) = 50*a

Block kinematics

The block moves with uniformly accelerated movement, so we apply the following formula to calculate the distance

d = 15m

yup its correct its: c) b b

the answer is b, have negligible mass