40 Questions
| Total Attempts: 251

Questions and Answers

- 1.How does a ramp make lifting a heavy object easier?
- A.
The ramp increases the amount of work you do.

- B.
The object is moved over a shorter distance.

- C.
Less force is needed to move the object over a longer distance.

- 2.If a barbell weighs 160 N, what other info do you need to calculate how much WORK it takes to lift it?
- A.
How high the barbell is being lifted

- B.
The amount of output force

- C.
The strength of the person doing the lifting

- 3.Greg applies a force of 100 N to move a box 5 meters. How much work did he do?
- A.
500 J

- B.
500 N

- C.
5 J

- 4._____________ is the lowest point between each crest of a wave.
- A.
Trough

- B.
Wavelength

- C.
Compression

- 5.The distance traveled by an object per unit time is called __________________.
- A.
Speed

- B.
Acceleration

- C.
Force

- 6.What is the unit for power?
- A.
Watt

- B.
Joule

- C.
Newton

- 7.Referring to one of Newton’s Laws, for every action, the reaction is ______________________
- A.
Equal and opposite

- B.
Increased significantly

- C.
Equal and in the same direction

- 8.What is power?
- A.
The rate at which work is done

- B.
The work that is done

- C.
The strength of someone or something

- 9.A device that makes work easier by changing the size or direction of force is called what?
- A.
Machine

- B.
Watt

- C.
Force

- 10.________________ is the tendency for all objects to resist any change in motion.
- A.
Inertia

- B.
Velocity

- C.
Mass

- 11.As the wavelength increases, the frequency.
- A.
Decreases

- B.
Increases

- C.
Stays the same

- 12.If two people lift identical stacks of books the same distance and one person does the job twice as fast, which of the following has doubled?
- A.
Power

- B.
Work output

- C.
Work input

- 13.How is work calculated?
- A.
Force times distance

- B.
Power times force

- C.
Power divided by distance

- 14.___________ is a unit that measures force.
- A.
Newton

- B.
Meters per second per second

- C.
Work

- 15.Work is being done when
- A.
You exert a force that moves an object in the direction of the force

- B.
An object is moving after you applied a force to it

- C.
You apply a force to an object

- 16.A ___________________ is a push or pull in any direction.
- A.
Newton

- B.
Force

- C.
Fluid

- 17.Which of the following types of waves requires a medium?
- A.
Sound waves

- B.
X-rays

- C.
Visible light

- 18.____________________ is the number of waves produced in a given amount of time
- A.
Frequency

- B.
Wavelength

- C.
Wave speed

- 19.If you travel from the Earth to the moon (gravitational force changes), the _____________.
- A.
Mass remains constant

- B.
Weight remains constant

- C.
Mass changes

- 20.Using the equation , solve for the following... = 340 m/s = 100 Hz = ?
- A.
3.4 m

- B.
240 m

- C.
34,000 m

- 21.______________ is a force that opposes motion
- A.
Friction

- B.
Gravity

- C.
Joule

- 22.The wave property that is related to the height of a wave is the
- A.
Amplitude

- B.
Frequency

- C.
Wavelength

- 23.You apply 250 N of force to move an object 10 meters and it takes 10 seconds to complete this task. How much power was used?
- A.
250 W

- B.
2,500 W

- C.
25 W

- 24.A remote controlled airplane can fly from one edge of the parking lot to the shore of the lake, a distance of about 150 meters. If it takes this plane 30 seconds to travel this distance what is this plane’s speed?
- A.
5 m/s

- B.
130 m/s

- C.
1,500 m/s

- 25.
**The acceleration of gravity is 9.8 m/s/s**- A.
True

- B.
False