Author Question: A 50.0-kg box is being pushed along a horizontal surface. The coefficient of kinetic friction ... (Read 19 times)

Hungry! · **on:** Jul 29, 2018

A 50.0-kg box is being pushed along a horizontal surface. The coefficient of kinetic friction between the box and the ground is 0.350. What horizontal force must be exerted on the box for it to accelerate at 1.20 m/s2?

A) 60.0 N
B) 116 N
C) 172 N
D) 232 N
E) 491 N

Question 2

What is the magnetic field at the center of a circular loop of wire of radius 4.0 cm when a current of 2.0 A flows in the wire?

A) 1.3 10-6 T
B) 3.1 10-6 T
C) 1.3 10-5 T
D) 3.1 10-5 T
E) 0 T