QUIZ 4: INCLINED PLANE, WEDGE, AND SCREW

Question 1

What machine is used to lift an engine?

Answer 1

Block and tackle

Question 2

What is an example of a seesaw?

Answer 2

First-class lever

Question 3

What machine is represented by a ramp?

Answer 3

Inclined plane

Question 4

What is an example of a pencil sharpener?

Answer 4

Wheel and axle

Question 5

What machine is a bottle opener?

Answer 5

Second-class
Lever

Question 6

What is the example of a nail?

Answer 6

Wedge

Question 7

What is represented by a bolt and nut?

Answer 7

Screw

Question 8

What machine is represented by a forearm?

Answer 8

Third-class lever

Question 9

What can only change the direction of a force?

Answer 9

Single fixed pulley

Question 10

What is a major problem in the use of the inclined plane?

Answer 10

Friction

Question 11

How can the mechanical advantage of the inclined plane be increased?

Answer 11

By increasing the ramp’s horizontal length.

Question 12

How does a wedge’s IMA change?

Answer 12

It increases as it gets thinner.

Question 13

What does an inclined plane reduce?

Answer 13

The effort or efficiency needed to move a load vertically.

Question 14

Which one of the following is not an example of a wedge?

Answer 14

Nut

Question 15

Is a screw simply a form of an inclined plane?

Answer 15

True

Question 16

Does the screw have very low efficiency?

Answer 16

True

Question 17

Given Fi = 400N, Fo = 800N, di = 5m, do = 2m, what is the AMA?

Answer 17

2

Question 18

Given Fi = 400N, Fo = 800N, di = 5m, do = 2m, what is the IMA?

Answer 18

2.5

Question 19

Given Fi = 400N, Fo = 800N, di = 5m, do = 2m, what is the efficiency?

Answer 19

80%