Science Questions: Chapter 18.

Question 1

Using a force to move an object through a distance is called______.

Answer 1

Work

Question 2

The balance point of a lever is the _______.

Answer 2

Fulcrum

Question 3

A machine that allow you to lift things by pulling down on a rope is a ____________.

Answer 3

Pulley

Question 4

The combination of all the force acting on an object is the ___________.

Answer 4

Net force

Question 5

Forces acting on an object that are equal an opposite are ________.

Answer 5

Gravity

Question 6

A force that work against motion is ____.

Answer 6

Friction

Question 7

A bar that moves against a fulcrum is a ____.

Answer 7

Lever

Question 8

A ramp is an example of a simple machine called an ____.

Answer 8

Inclined plane

Question 9

The force that earth applies to objects near its surface is ______.

Answer 9

Force

Question 10

A machine that work easier is a ____________.

Answer 10

Simple machine

Question 11

A can opener is made up of severals simple machines.One is wedge.What is another.

Answer 11

Wheel and axle

Question 12

which force causes a ship to float in water?

Answer 12

buoyant

Question 13

which simple machine is part of a screw?

Answer 13

fulcrum

Question 14

which force makes a compass work ?

Answer 14

magnetic force

Question 15

which of these machines is a wheel and axle?

• flag
• can opener
• compass

Answer 15

flag

Question 16

which of these machines can be used to lift a piano into a second story window?

Answer 16

block and tackle