science

Question 1

The product of force and distance.

Answer 1

Work

Question 2

The rate of doing work

Answer 2

Power

Question 3

The SI unit of work

Answer 3

Joule

Question 4

The SI unit of power

Answer 4

Watt

Question 5

The number of times that the machine increases an input force.

Answer 5

Mechanical Advantage

Question 6

The percentage of work input and work output of a machine.

work output/work input x 100%

Answer 6

Efficiency

Question 7

A rigid bar that is free to move around a fixed point.

Answer 7

Lever

Question 8

The fixed point a bar rotates around.

Answer 8

Fulcrum

Question 9

A simple machine that consists of a disk and a cylinder through it, each one with a different radius.

Answer 9

Wheel and Axle

Question 10

A slanted surface along which a force moves.

Answer 10

Inclined Plane

Question 11

The force you exert on a machine.

Answer 11

Input Force

Question 12

The distance the force acts through.

Answer 12

Input Distance

Question 13

The force that is exerted by the machine.

Answer 13

Output Force

Question 14

The distance the output force is exerted.

Answer 14

Output Distance

Question 15

AMA

Answer 15

Output force/Input force

Question 16

IMA

Answer 16

Input distance/Output distance

Question 17

a force that acts on a body moving in a circular path and is directed toward the center around which the body is moving.

Answer 17

Centripetal force

Question 18

An inclined plane wrapped around a cylinder

Answer 18

Screw

Question 19

is a simple machine that consists of a rope that fits into a groove in a wheel.

Answer 19

Pulley

Question 20

is a wheel attached in a fixed location?

Answer 20

Fixed Pulleys

Question 21

is attached to the object being moved rather than to a fixed location

Answer 21

Movable Pulley

Question 22

By combining fixed and movable pulleys into a _________ a large mechanical advantage can be achieved

Answer 22

Pulley system

Question 23

is a combination of two or more simple machines that operate together

Answer 23

Compound Machines

Question 24

a device that changes force

Answer 24

Machines

Question 25

is the distance between the input force and the fulcrum

Answer 25

Input arm

Question 26

is the distance between the output force and the fulcrum

Answer 26

Output arm

Question 27

equal to about 746 watts

Answer 27

horsepower

Question 28

the mechanical advantage has to be greater than 1 equal to 1 or less than 1

Answer 28

first-class lever

Question 29

the mechanical advantage is always greater than 1

Answer 29

second-class levers

Question 30

the mechanical advantage is always less than 1

Answer 30

third-class levers

Question 31

is a V-shaped object whose sides are two inclined planes sloped toward each other

Answer 31

Wedge