Name: ______________________________________ Period: _______ Date_______ ______
Miss Brienza
50
Honors Physics
Forces Test
1. Use the information below to answer the following questions. SHOW ALL WORK!! (20 pts)
a. Draw a force diagram (free body diagram) for the child and sled. Mass of child + sled =
60.0 kg.
b. Find the normal force if the father pulls
with a force of 160.0 N along the rope
c. Find the acceleration of the child and sled if the coefficient of kinetic friction is 0.20
along the snow covered path and the father pulls with a force of 160.0 N along the
rope.
d. If the child and sled are initially moving at 1.00 m/s what will be the speed of the 60.0
kg child & sled be moving at the 10.0 meter mark. (Assume the sled and child are
initially moving at 1.00 m/s) if the father pulls with a force of 160 N along the rope?
2. Two boxes are pulled along a frictionless surface with massless ropes.
a) Draw a free body diagram for the system and for each box.
Box B
Box A
System
b) Determine the acceleration of the system.
c) Find the tension on the cable between the boxes.
d) The boxes are placed on a new table. Find the coefficient of kinetic friction if a 50.0 N
force accelerates the system 1.25 m/s2.
3. A sled starts from rest down a 15 degree incline. Assume the coefficient of friction is 0.05.
a. Draw all the forces acting on the sled
b. Calculate the acceleration of the sled.
c. Calculate the speed of the sled after 10 seconds.