Download Physics Homework

Physics Homework
Name: ____________________
1. On Earth, a scale shows that you weigh 585 N. What is your mass?
2. What is the weight of a 37.4 kg mass?
3. A boy exerts a 36 N horizontal force as he pulls a 52 N sled across a
cement sidewalk at constant speed.
a. What is the force of friction between the sidewalk and the metal
sled?
b. What is the coefficient of friction between the sidewalk and
sled?
4. A skier traveling at 13 m/s on al level surface comes to a stop in 122
m. What is the coefficient of friction between the skis and the snow?
5. A 65 kg swimmer jumps off a 10 m tall tower.
a. Find the swimmer’s velocity on hitting the water
b. The swimmer comes to a stop 2.0 m below the surface. Find the
net force exerted by the water.
6. Sally pulls a 55 kg carton across the floor with a rope that makes an
angle of 48° with the horizontal. The magnitude of the pull is 590 N.
a. What is the weight of the carton?
b. Assuming no friction, what is the acceleration of the carton?
c. What is the normal force on the carton
d. If the coefficient of friction between the carton and floor is .6,
what is the acceleration of the carton?