Author Question: Its more difficult to start moving a heavy carton from rest than it is to keep pushing it with ... (Read 61 times)

Tirant22 · **on:** Jul 29, 2018

Its more difficult to start moving a heavy carton from rest than it is to keep pushing it with constant velocity, because

A) The normal force is greater when the carton is at rest.
B) s < k.
C) Initially, the normal force is not perpendicular to the applied force.
D) k < s.
E) s = k.

Question 2

A straight wire 20 cm long, carrying a current of 4 A, is in a uniform magnetic field of 0.6 T. What is the force on the wire when it is at an angle of 30 with respect to the field?

A) 0.2 N
B) 0.3 N
C) 0.4 N
D) 0.5 N
E) 0.6 N