Posted by Anonymous on Wednesday, March 10, 2010 at 11:29am.
A boy pulls a sled of mass 5.0 kg with a rope that makes an 60.0° angle with respect to the
horizontal surface of a frozen pond. The boy pulls on the rope with a force of 10.0 N; and the
sled moves with constant velocity. What is the coefficient of friction between the sled and the
ice?

physics  drwls, Wednesday, March 10, 2010 at 12:32pm
Constant velocity means that the forces add up to zero.
Do a force balance in the direction of motion. It says:
10.0 cos 60 = friction force = (M g  10.0 sin 60)*Uk
Solve for Uk, the coefficient of (kinetic) friction.
The reason for the 10.0 sin 60 term is that the upward pull on the rope reduces the normal force of the sled onto the ice. That term gets subtracted from the sled's weight.

physics  asdfghj, Sunday, October 30, 2016 at 9:29pm
.124
Answer This Question
Related Questions
 math  When a boy pulls his sled with a rope, the rope makes an angle of 70 with...
 Physics  The sled is stuck in the snow. A child pulls on the rope and finds ...
 physics  A child is pulling a sled across a horizontal surface by a rope that ...
 Physics  A person exerts a force of 90 N on a rope that pulls a sled across a ...
 Physics  A boy pulls a sled with a force of 40 N on a rope 2.5 meters long. The...
 Physics  1. Tyler pulls a box full of baby ferrets across the floor by means of...
 Physics  2. Tyler pulls a box full of baby ferrets across the floor by means of...
 Physics  A boy pulls a sled with a force of 40N on a rope 2.5 meters long. The ...
 physics  Wayne pulls a 305 N sled along a snowy path using a rope that makes a ...
 Physics  A 43.3 kg boy and a 60.0 kg girl are on the surface of a frozen lake, ...
More Related Questions