Physics Midterm Exam Review Quiz

18 Questions | By Alexnahon | Last updated: Mar 21, 2022 | Total Attempts: 148

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A quiz to help review for the midterm exam.

Questions and Answers

1.

How do you find the mechanical advantage of a lever? Remember to include units in your answer.
2.

Describe the three classes of levers. Include the location of the fulcrum and the amount of force that is input and output for each class.
3.

How do you fid the gear ratio?
4.

How do you find the mechanical advantage of a ramp?
5.

How do you find the mechanical advantage of a screw?
6.

Efficiency is measured in percentages. Why is no machine 100% efficient? Copy the text below (including the dashes), paste it into your answer and then use one word.Some energy is lost to ________ in all machines.--
7.

The efficiency is less than 100% for virtually all process that do what?
8.

A simple machine has a mechanical advantage of 5. If the output force is 10N, what is the input force?
9.

Which of the following is a calculation of work?
- A.
  
  Work (j) = Forece (N) x distance (m)
- B.
  
  Work (j) = Forece (N) / distance (m)
- C.
  
  Work (N) = Forece (j) x distance (m)
- D.
  
  Work (N) = Mass (kg) x Gravity x Height (m)
- E.
  
  Both 'A' and 'D' are correct.
10.

In the image above, what hand does more work.
- A.
  
  A
- B.
  
  B
- C.
  
  C
- D.
  
  A & B are equal and are greater than C
- E.
  
  No work is done using these three forces.
11.

Alexander has a mass of 70 kilograms. HIs apartment is on the second floor, 5 meters up from ground level. How much work does he do against gravity each time e clims the stairs to his apartment?
- A.
  
  70N
- B.
  
  9.8N
- C.
  
  5m
- D.
  
  686N
- E.
  
  None of the above
12.

Power is measure in _______, because the man who invented the steam engine was named ______ _____. Power (P) is equal to ______ ______ by ______.
- A.
  
  Joules; James Joule; mass; multiplied; distance
- B.
  
  Newtons; Isaac Newton; time; multiplied; distance
- C.
  
  Newtons; Isaac Newton; mass; divided; distance
- D.
  
  Kilograms; Ken Kilo; work; divided; time
- E.
  
  Watts; James Watts; work; divided; time
13.

What is a device with moving parts that work together to accomplish a task?
- A.
  
  Gear
- B.
  
  Pulley
- C.
  
  Machine
- D.
  
  Wheel and axel
- E.
  
  Lever
14.

In a machine, the ______ ______ in newtons, or the force that the machine applies to what you are trying to move, divided by the _____ _____ in newtons, or the force you apply to the machine, is known as the ______ ______ of the machine.
- A.
  
  Input force; output force; work done
- B.
  
  Input force; output force; power used
- C.
  
  Output force; input force; work done
- D.
  
  Output force; input force; power used
- E.
  
  Output force; input force; mechanical advantage
15.

The _____ _____ of a machine can never be _____ than the ______ ______. When you design a machine that multiplies force, you pay by having to apply the force over a ______ distance.
16.

The force in a rope is called the ____.
17.

When we measure how close to perfect a machine is, we are measuring its _____.
18.

Any process that is not 100% efficient is ___________