Have an account?
Skip to Content
Build your own quiz
Suggestions for you
24 questions
Show Answers
See Preview
- 1. Multiple Choice
A sled is at rest on a slope, held by a rope attached to a pole, as shown. Which forces should be shown on a Free Body Diagram for the sled?
gravity and the tension in the rope
gravity, the tension in the rope, and the normal force
gravity only
gravity, the tension in the rope, the normal force, and the net force
- 2. Multiple Choice
A tugboat is attached to a barge of mass 5100 kg with cable #1. A second barge with a mass of 12 000 kg is attached to the first barge with cable #2. The tugboat pulls the two barges with an acceleration of 0.030 m/s2. What are the tensions in cables #1 and #2?
cable #1: 510 N; cable #2: 360 N
cable #1: 360 N; cable #2: 510 N
cable #1: 360 N; cable #2: 360 N
cable #1: 510 N; cable #2: 510 N
- 3. Multiple Choice
A skier slides down a frictionless hill with an acceleration of 2.04 m/s2. What angle does the hill make with the horizontal?
78.0°
30.0°
12.0°
6.0°
- 4. Multiple Choice
A child wearing a slippery snowsuit is sitting on a sled such that the coefficient of static friction between the suit and the sled is 0.112. What is the maximum acceleration possible for the sled before the child slips off?
9.80 m/s2
8.70 m/s2
1.10 m/s2
0 m/s2
- 5. Multiple Choice
You are riding on a “free-fall” ride at an amusement park. You hold a coin in front of you and let it go. What will the coin do?
move upward relative you
stay in front of you
move downward relative to you
move outward away from you
- 6. Multiple Choice
A road is banked such that cars can go around the curve even if it is icy and friction is essentially zero. What forces belong on a Free Body Diagram for a car under these conditions?
gravity, normal
gravity only
normal only
gravity, normal, centripetal
- 7. Multiple ChoiceWhat is a force that works AGAINST MOTION?ForceMotionGravityFriction
- 8. Multiple ChoiceWhy does a rolling ball stop?GravityFrictionWaterfallsSand
- 9. Multiple ChoiceIn a game of tug of war, one dog is pulling with a force of 10N north and another dog is pulling with 5N south. What is the net force?5N north15N north50N north5N south
- 10. Multiple Choice
Frictional force between two surfaces depends on which of the following?
I. speed of the objects rubbing together
II. surface area of the objects
III. materials the surfaces are made of
I and II
I and III
I, II and III
III only
- 11. Multiple Choice
The diagram above shows the forces acting on a box. If the box is 4 kg, what is its acceleration?
4 m/s2, left
4 m/s2, right
3 m/s2, left
3 m/s2, right
- 12. Multiple Choice
A net force of 9.0 N accelerates a wagon at 3.0 m/s2. What net force would be required to accelerate the same wagon at 9.0 m/s2.
27 N
81 N
15 N
3 N
- 13. Multiple Choice
You push a 80-kg sofa to move it to a different location in the room. It takes a force of 140 N to start the sofa moving. What is the coefficient of static friction between the sofa and the carpet?
0.175
1.75
0.75
0.275
- 14. Multiple ChoiceWhat is the net force and in what direction will the block move?40 N Right60 N Right60 N Left40 N Left
- 15. Multiple Choice
If the wind is heading south with a force of 5 N, and a car is going north with force of 78936 N, what is the Net Force and Direction.
78931 N North
78931 N South
78531 N North
78531 N South
- 16. Multiple Choice
The resultant between 2 vectors can be found by placing the vectors
tail to tail.
tip to tip.
tip to midpoint.
tip to tail.
- 17. Multiple Choice
When adding two vectors that are perpendicular, it is best to use the____________.
Pythagorean theorem
law of cosines
law of sines
free-body diagram
- 18. Multiple Choice
A box with a mass of 10kg is at rest on a table. The normal force acting on the box is_____.
989 N downward
9.8N upward
10kg upward
98N upward
- 19. Multiple Choice
An ice-skater who weighs 100N is gliding across the ice. If the force of friction is 2N, what is the coefficient of kinetic friction?
4
50
.04
0.02
- 20. Multiple Choice
A sofa is at rest on the floor. The mass of the sofa is 50 kg and the coefficient of static friction between the sofa and the floor is 0.01. The maximum force of static friction is approximately
4.9N
49N
500N
5000N
- 21. Multiple Choice
A mover of household goods wants to push a heavy bureau at rest on the floor across the floor. He puts his shoulder against the bureau and begins to push. He gradually increase the force of his push until the bureau moves when he keeps the pushing force constant. The force of friction_____.
decreases and then increases
increases and then decreases
continues to increase
remains the same
- 22. Multiple Choice
The equilibrant of a force directed 45owest of north has the direction
45o west of north
45o south of east
45o east of north
45o west of south
- 23. Multiple Choice
The magnitude of the equilibrant of a 3 N force acting toward the east and a 4 N force acting toward the south is________.
7N
-7N
5N
1N
- 24. Multiple Choice
A ship at sea is due into a port 400.0km due south in two days. However, a severe storm comes in and blows it 300.0km due east from its original position. How far is the ship from its destination? In what direction must it travel to reach its destination? (1dp)
500 Km 53.1o SW
500 Km 36.9o SW
700 Km 45o NE
700 Km 45o SW
- Answer choicesTagsAnswer choicesTags