Download Static Force Review Questions

Name
Date
Pd
Review Questions
1. Draw a force diagram to represent the situation below. The box slides down the ramp at constant
speed.
2. a) What is the value and units of g?
b) What does this value represent?
3. Determine the x and y components of the force vector below. Show work.
4. a) Write the equations for the sum of the forces acting in the x and y directions for the junction
of the cords in the diagram below.
ΣFx=
ΣFy=
b) Find the values of T1 and T2.
For each force diagram, draw a vector for each force, label the force correctly, and provide any
congruency marks that are appropriate on the vectors.
5.
One box sitting on a frictionless ramp is attached to another box that is hanging. The pulley is
frictionless and has negligible mass. The boxes are not moving.
A) Draw a force diagram for the hanging box
B) Draw a force diagram for the box on the ramp
6.
A little girl is riding on an elevator. On the way up, the elevator moves at a constant speed. On the
way down the elevator accelerates.
a. Draw a force diagram for the girl as the elevator goes up at a constant speed.
b. Draw a force diagram for the girl as the elevator accelerates down.
a.
b.
7. Horse and Cart Problem
A horse is pulling on a cart, accelerating the cart forward.
a) Make a force diagram for the cart to the left of the picture.
b) Make a force diagram for the horse to the right of the picture.
c) Which force is greater…
1. The force of the horse on the cart
2. The force of the cart on the horse
3. These 2 forces are equal
4. There is not enough information to tell
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PART 2
1. The masses are motionless.
60o
A. Find the tension force in each rope.
30o
B. Determine the mass M.
M
50 kg
2. The 50 kg crate moves to the right at a constant speed.
A. What is the unbalanced force on the crate?
20o
B. Find the tension in the rope.
50 kg
C. Find the normal force acting on the crate.
30 kg
D. Find the friction force acting on the crate.
3. If B has a mass of 20 kg, find the tension in each string and the mass of A. All masses
are at rest.
40o
60o
B
A
4. The system shown at right is in equilibrium (not moving).
A. Find the tension in the rope attached to the wall.
B. Determine the friction force that acts between
the 20 kg mass and the table.
55o
20 kg
10 kg
5. The rock climber shown is taking a break in his descent. While motionless, he pushes
horizontally against the rock face with a force of 250 N.
A. Find the tension in the rope.
B. Determine the mass of the rock climber.
15o