Period 5 Work Practice Quiz
Covers work and energy transfers in grade 11 physics
- 1.Work....
- A.
Changes the amount of mechanical energy an object has.
- B.
Can only ever effect how fast an object is moving.
- C.
Can only be caused by friction.
- D.
Just means energy transfers from kinetic to potential energy.
- 2.An object has mechanical energy. This object could.... (CHECK ALL THAT APPLY!)
- A.
...have kinetic energy
- B.
...have potential energy
- C.
...have both kinetic and potential energy.
- D.
...be at rest on the ground.
- 3.A car hits a patch of ice while going downhill. All of it's potential energy turns into kinetic energy. Assume there is no friction and you can neglect air resistance. In this situation, the car is experiencing:
- A.
Positive Work
- B.
Negative Work
- C.
Conservation of Mechanical Energy
- 4.A trick pilot puts her plane into a nosedive. All of the plane's potential energy turns into kinetic energy. Assume there is no friction and you can neglect air resistance. In this situation, the plane is experiencing:
- A.
Positive Work
- B.
Negative Work
- C.
Conservation of Mechanical Energy
- 5.You lift a box over your head at a constant velocity. In this situation, the box is experiencing:
- A.
Positive Work
- B.
Negative Work
- C.
Conservation of Mechanical Energy
- 6.A child drags a sled up a hill. In this situation, the sled is experiencing:
- A.
Positive Work
- B.
Negative Work
- C.
Conservation of Mechanical Energy
- 7.A large man is sliding down a slip-n-slide when he hits the grass and comes quickly to a stop In this situation, the man is experiencing:
- A.
Positive Work
- B.
Negative Work
- C.
Conservation of Mechanical Energy
- 8.A futuristic astronaut is floating, still and abandoned, in space. Then an alien tractor beam locks on to her and accelerates her forward. She is experiencing:
- A.
Positive Work
- B.
Negative Work
- C.
Conservation of Mechanical Energy
- 9.The brakes of a car are applied. In this situation, the car is experiencing:
- A.
Positive Work
- B.
Negative Work
- C.
Conservation of Mechanical Energy
- 10.Your friend is sitting in a shopping car. You rush up and push the cart forward. Your friend's mechanical energy...
- A.
Increased
- B.
Decreased
- C.
Was Conserved
- 11.Your crush comes flying toward you on the ice skating rink, out of control. You grab on to them and bring them to a stop. Your crush's mechanical energy...
- A.
Increased
- B.
Decreased
- C.
Was Conserved
- 12.You accelerate the motorcycle you are riding by giving it a little gas. Your mechanical energy...
- A.
Increased
- B.
Decreased
- C.
Was Conserved
- 13.Mechanical energy is made of:
- A.
Potential and kinetic energy
- B.
Thermal and friction energy
- C.
Joule and Newton energy
- 14.An object's mechanical energy increased. That means...
- A.
Negative Work was done on the object
- B.
Positive work was done on the object
- C.
No work was done on the object
- D.
It's mechanical energy was conserved
- 15.A child is resting on a sled. Then her big brother pulls her forward, doing 200 J of work. The ground is level. Friction isn't slowing the girl down. What is the girl's final kinetic energy?
- A.
100 J
- B.
200 J
- C.
There is no way to answer this question.
- 16.A child is resting on a sled. Then her big brother pulls her forward, doing 200 J of work. Meanwhile, friction does -50 J of work on the sled. The ground is level. What is the girl's final kinetic energy?
- A.
100 J
- B.
150 J
- C.
200 J
- D.
There is no way to answer this question.
- 17.A child is resting on a sled. Then her big brother pulls her forward, doing 200 J of work. Meanwhile, friction does -50 J of work on the sled. The ground is level. The girl has a mass of 35 kg. What is her final velocity?
- A.
8.57 m/s
- B.
16.3 m/s
- C.
2.93 m/s
- D.
2.07 m/s
- 18.You apply 80 J of work to a ball, throwing it straight up in the air. Assume there is no air resistance. At apogee, the ball will have...
- A.
80 J of kinetic energy, 0 J of mechanical energy
- B.
80 J of potential energy, 0 J of mechanical energy
- C.
80 J of kinetic energy, 80 J of mechanical energy
- D.
80 J of potential energy, 80 J of mechanical energy
- 19.You do 300 J of work on a box as you lift it from the floor up to a shelf. The box has a mass of 20 kg. The box now has...
- A.
300 J of kinetic energy
- B.
300 J of potential energy
- C.
300 J of thermal energy
- D.
300 J of friction
- 20.You do 300 J of work on a box as you lift it from the floor up to a shelf. The box has a mass of 20 kg. How high did you lift the box?
- A.
3 m
- B.
3.01 m
- C.
15 m
- D.
1.53 m
Questions: 10 | Attempts: 582242 | Last updated: Sep 18, 2021
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