Mechanics Week 3 Quiz

Question 1

What is Force?

Answer 1

The push or pull on an object.

Question 2

What are the two constant forces?

Answer 2

Gravity and Friction.

Question 3

What is Friction?

Answer 3

Resistance to movement.

Question 4

What is the Force of Friction?

Answer 4

Force working in the opposite direction of motion.

Question 5

What is torque?

Answer 5

Rotational force times a distance OR
Rotational Force x Distance

Question 6

What is work?

Answer 6

Linear Force times a Distance OR
Linear Force X Distance

Question 7

What is power?

Answer 7

Rate at which work gets done. (Force/Time)

Question 8

What is RPM (Revolutions Per Minute)?

Answer 8

Rate of rotation.

Question 9

What is horsepower?

Answer 9

Standard unit of power
TxRPM/5252
T=Torque

Question 10

What is conservation of energy?

Answer 10

Energy cannot be created, nor destroyed, but can change forms.

Question 11

What is efficiency?

Answer 11

Power Out/Power In. Must be less than 1.

Question 12

How do you find the correct wrench size based on a bolts diameter?

Answer 12

Multiply the diameter by 3/2.

Question 13

How do you determine the wrench needed for a grade 8 or heavy nut?

Answer 13

Take the answer you got by multiplying by 3/2, and add 1/8.

Question 14

What happens to horsepower when torque increases?

Answer 14

Horsepower decreases