Have an account?
Skip to Content
Build your own quiz
Suggestions for you
9 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 FBD 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 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°
- 3. 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
- 4. Multiple Choice
Which statement is true of fictitious forces?
They are found only in non-inertial frames of reference.
They are found only in inertial frames of reference.
They are caused by real factors such as gravity.
They are real forces even if their causes are not apparent.
- 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? (ignore air resistance)
move upward relative you
stay in front of you
move downward relative to you
move outward away from you
- 6. Multiple Choice
A ball is tied to the end of a string and whirled around a table in a horizontal circle. If the speed is doubled, how does the centripetal acceleration change?
the centripetal acceleration is unchanged
the centripetal acceleration is doubled
the centripetal acceleration is tripled
the centripetal acceleration is quadrupled
- 7. Multiple Choice
An airplane with a mass of 800 kg is flying in a circle of radius 500 m at 50 m/s. What is the centripetal force required to keep the airplane flying in the circle?
50 N
80 N
4000 N
8000 N
- 8. 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 FBD for a car under these conditions?
gravity, normal
gravity only
normal only
gravity, normal, centripetal
- 9. Multiple Choice
The top of a hill on a roller coaster has a circular shape with a radius of 25.0 m. A car going over the top makes the passengers feel weightless at the very top. How fast is the car going?
3.13 m/s
9.80 m/s
15.7 m/s
245 m/s
- Answer choicesTagsAnswer choicesTags