Download Forces with acceleration homework

Name
UNIT 5 - Worksheet 2 - Inclines and others
1.
Bock
Refer to the drawing.
a.
b.
Construct a force diagram for the block.
Determine the components of the force of
the Earth on the block
Perpendicular to the ramp.
Parallel to the ramp.
c.
If the block were stationary, what must the force of friction be?
d. If there were NO friction. What would happen to the block?
2. A 20 kg mass is allowed to accelerate down a frictionless
15° ramp.
a. Resolve the blocks FE into parallel and
perpendicular components
b. What is the acceleration down the ramp?
c. If the ramp is 5m long, how long will it take to slide down it?
Date
Unit 6 Worksheet 2
page 2
3. An elevator is moving up at a constant velocity of 4 m/s, as
illustrated in the diagram to the right. The man has a mass of
80. kg.
a. Construct a force diagram for the man.
b.
4.
The elevator now accelerates upward at 2.0 m/s2.
a. Construct a force diagram for the man.
b.
5.
What force does the floor now exert on the man?
Upon reaching the top of the building, the elevator accelerates
downward at 3.0 m/s2.
a. Construct a force diagram for the man.
b.
6.
What force does the floor exert on the man?
What force does the floor now exert on the man?
While descending in the elevator, the cable suddenly breaks. What is the force of the floor
on the man? Explain.