DJ Science 10/25/22

Question 1

What is Scientific Work?

Answer 1

W = Fs, an example is pushing a car horizontally from rest.

Question 2

How is work calculated when lifting an object?

Answer 2

W = Fd

Question 3

What happens when there is a force at an angle?

Answer 3

It can be split into two perpendicular components.

Question 4

The formula for power?

Answer 4

P = W/t

Question 5

SI unit for power?

Answer 5

Watt(w)

Question 6

What is a machine? Give an example.

Answer 6

Something created to make anything you do easier. A phone.

Question 7

What is the difference between an input force and an output force?

Answer 7

The input force that you use on an inclined plane is the force that you use to push or pull an object. The output force is the force that you would need to lift the object without the inclined plane.

Question 8

What are the three ways a machine can work easier?

Answer 8

By increasing distance, changing the direction of applied force, or multiplying the force of speed and energy combined.

Question 9

What is the mechanical advantage?

Answer 9

the ratio of the force produced by a machine to the force applied to it

Question 10

The formula for mechanical advantage?

Answer 10

MA = output force/input force

Question 11

What is efficiency

Answer 11

It is the ratio of the useful work performed by a machine or in a process to the total energy expended or heat taken in.

Question 12

The formula for efficiency?

Answer 12

output force divided by input force

Question 13

What is a simple machine?

Answer 13

It is a mechanical device that changes the direction or magnitude of a force.