9.1: Work & Power

Question 1

What is the formula for work?

Answer 1

force x distance

Question 2

Solve for work done using 5N or force to lift object up 0.5m stairs.

Answer 2

w = 2.5N x m

Question 3

What simple machine make use or turning?

Answer 3

Pulley, Wheel & Axel

Question 4

What is a pulley?

Answer 4

Simple machine with grooved wheel and cable

Question 5

What are the 3 types of pulleys?

Answer 5

Fixed, Movable, Block & Tackle

Question 6

What is a fixed pulley?

Answer 6

Changes direction of force; not amt. applied MA = 1

Question 7

What is a movable pulley?

Answer 7

Decreases amt. of input force; doesn’t change direction MA = 2

Question 8

What is a block & tackle pulley?

Answer 8

Combo of both fixed and movable MA = 3

Question 9

What is work?

Answer 9

Force put on an object that causes it to move

Question 10

What is force?

Answer 10

Push/Pull

Question 11

What is power?

Answer 11

Rate at which work is done

Question 12

What is a joule?

Answer 12

SI Unit of work

Question 13

What is a machine?

Answer 13

Allows work to be easier by changing distance, direction, and amount or force exerted

Question 14

What is the equation for force?

Answer 14

F = m/a

Question 15

What is the input force?

Answer 15

Force you exert

Question 16

What is the input distance?

Answer 16

Any length traveled to do work

Question 17

What is output force?

Answer 17

Force exerted on object by machine

Question 18

What is mechanical advantage?

Answer 18

of times machine increases a force exerted on it

Question 19

What is the formula for MA?

Answer 19

Output force/Input force

Question 20

What are the 3 types on inclined planes?

Answer 20

Ramp, Screw, Wedge

Question 21

What is a ramp?

Answer 21

Spreads input force over longer distance

Question 22

What is a screw?

Answer 22

Acts as an inclined plane wrapped around cylinder

Question 23

What is a wedge?

Answer 23

Move inclined plane into object

Question 24

What is a fulcrum?

Answer 24

Fixed pint which lever rotates

Question 25

What are the types or levers?

Answer 25

First class, Second, and Third

Question 26

What is a 1st class lever?

Answer 26

Change the direction of the input force

Question 27

What is a 2nd class lever?

Answer 27

Increase force

Question 28

What is a 3rd class lever?

Answer 28

Increase distance; not direction of input force

Question 29

What is a compound machine?

Answer 29

OF of one machine becomes IF of another simple machine