2016 Mod4

Question 1

Define the following terms:

A. Simple machine

Answer 1

A device that either multiplies or redirects a force.

Question 2

B. Force

Answer 2

A push or pull exerted on an object in an effort to change that objects velocity.

Question 3

C. Mechanical advantage

Answer 3

The amount by which force or motion is magnified in a simple machine

Question 4

D. Diameter

Answer 4

The length of a straight line that travels from one side of a circle to the other and passes through the center

Question 5

E. circumference

Answer 5

The distance around a circle

Question 6

How is applied science different from science

Answer 6

Science is motivated by curiosity to understand.

Applied science is trying to find something useful.

Question 7

What gives rise to technology

Answer 7

A new process more machine that makes life better or a job easier

Question 8

Identify each of the following as science experiment or an applied science experiment

A. An experiment to determine how to make electronic circuits smaller

B. Can experiment to understand what factors affect how electricity runs in an electronic circuit

C. And experiment to figure out how to reduce electronic noise in an electronic circuit

D. An experiment to figure out the speed of electrons as they flow through an electronic circuit

Answer 8

A. Applied science

B. Science

C. Applied science

D. Science

Question 9

Which of the following would be considered technology

A. A classifications team for all animals

B. A vaccination that will keep animals from contracting the flu

C. A new diet for dogs that will lead to longer life

D. And understanding of what causes urinary-tract infections and cats

Answer 9

✅ A.

✅ B.

✅ C.

❎ D.

Question 10

List the six types of simple machines

Answer 10

A lever, a wheel and axle, a pulley, An inclined plane, a wedge, and a screw

Question 11

Which two simple machines look identical

Answer 11

The inclined plane and the wedge

Question 12

What is the mechanical advantage of a first-class lever in which the fulcrum is 10 inches from the resistance and 40 inches from the effort

Answer 12

40÷10 equals four

So the mechanical advantage is four

Question 13

What does the mechanical advantage in question eight mean

Answer 13

I can lift something that weighs 100 pound with only 25 pounds of effort

Question 14

A shovel is an example of a lever. To what class does the show will be long

Answer 14

Second class lever

Question 15

A child’s seesaw is a lever. What class does it belong

Answer 15

The first class lever

Question 16

What is the mechanical advantage of a wheel and axle when the wheel has a diameter of 15 inches and the axle have a diameter of 3 inches

Answer 16

15÷3 = 5

So the mechanical advantage is five

Question 17

If a person turn the wheel of the wheel and axle in question 12 what would the mechanical advantage do

Answer 17

They would be able to turn something with a lot less force

Question 18

If a person turn axle in the wheel and axle in question 12, what would the mechanical advantage do

Answer 18

It would make something go faster with less force

Question 19

A block and tackle is composed of six pleased that all work together. What is the mechanical advantage of the block and tackle system

Answer 19

Six

Question 20

Using a block and tackle system in question 15, how many feet of rope what do you have to be pulled if a person wanted to lift the load one foot

Answer 20

6 feet of rope

Question 21

What is the mechanical advantage of an inclined plane with a slope of 6 feet and a height of 2 feet

Answer 21

6÷2 = 3

Question 22

What is the mechanical advantage of a wedge it with the same dimensions as the inclined plane in 17

Answer 22

Three

Question 23

A screw with a pitch of 0.1 inches is turned with a screwdriver whose diameter is 2 inches. What is the mechanical advantage

Answer 23

3. 141 6×2 = 6.2832

6. 2832÷0.1 equals 62.832

Question 24

If you are having a hard time turning this group should you get a longer screw driver or a fatter one

Answer 24

A fatter one