Simple Machines

Question 0

What’s in the middle of a second-class lever

Answer 0

Load

Question 1

What is in the middle of a first class lever

Answer 1

The fulcrum

Question 2

In the middle of the third class lever

Answer 2

Effort

Question 3

What do Simple machines do

Answer 3

Make work either easier or faster

Question 4

What do Rollers do

Answer 4

Make it easier to move heavy things by reducing friction

Question 5

What is an inclined plane

Answer 5

It is a sloping surface that uses less work over a longer distance. And is easier than lifting the object

Question 6

What Is a wedge

Answer 6

An inclined plane that moves. Thick at one end and skinny at the other. It can lift or split something apart.

Question 7

What is a screw

Answer 7

The screw is an inclined plane wrapped around a shaft that can fasten things together

Question 8

What is a wheel and axle

Answer 8

It’s a type of lever the wheel turns around small cylinder called an axle the wheel and axle can help us lift and move heavy loads the wheels reduce friction so things can move easier

Question 9

What is a pulley

Answer 9

A wheel with A groove in it where a belt or rope moves

Question 10

What is friction

Answer 10

A force that resists motion between two objects that touch. There’s more friction between rough things than smooth things

Question 11

What is effort

Answer 11

The force that produces movement

Question 12

What Is a load

Answer 12

The Object being moved

Question 13

Is a gear

Answer 13

A wheel with teeth

Question 14

What is a fixed pulley

Answer 14

A fixed pulley uses one rope and one pulley

Question 15

What is a movable pulley

Answer 15

A movable pulley includes 2 or more pulleys and ropes and reduces the force needed by half

Question 16

Name 5 examples of a first class lever

Answer 16

Paint can opener, shovel, scissors, bottle opener, and a dolly

Question 17

Name 3 examples of a second class lever

Answer 17

Nut opener, wheel barrow, and a dolly

Question 18

Name 3 examples of a third class lever

Answer 18

A hockey stick, baseball bat, and a fishing rod

Question 19

What’s the advantage of a chain drive

Answer 19

Less slippage

Question 20

What is a block and tackle

Answer 20

A fixed pulley and a movable pulley linked together by ropes

Question 21

Name 5 examples of a fixed pulley

Answer 21

Clothes line, flag pole, window blinds, wheel and rope, and a wishing pulley

Question 22

Name two belt drive systems and how to the driver and follower move

Answer 22

Crossed belt makes them move in opposite directions

Regular belt makes them move the same way

Question 23

How do gears move on wheel on wheel contact?

What if there’s an idler

Answer 23

No idler they move in opposite directions

1 idler in the middle makes the wheels turn in the same direction

Question 24

How do gear on a bike work? | Which do you use to go uphill and downhill

Answer 24

2 gears are attached by a chain and so the pedal is the lever turning the pedals drives the chain Uphill: lower gear you have to pedal more to make it easier to go uphill Downhill: higher gear you pedal less and the wheel turns more

Question 25

What happens if you add more pulleys to help lift something

Answer 25

The effort is cut in half making it easier

Question 26

What is a compound machine | Give two examples

Answer 26

Two or more simple machines joined together Bike(levers, gears, wheel and axle) Can opener( lever, gear)

Question 27

Name 6 simple machines and give examples

Answer 27

``` Levers 1st teeter totter, 2nd nut opener,3rd fishing rod, Wheel and axle, door nob, Ferris wheel Inclined plane, wheel chair ramp Wedge, knife, door stopper Screw, screw Pulleys and gears, clothes line, bike ```