Machines

Question 1

A moment is sometimes known as a ______ force

Answer 1

Turning

Question 2

How do u calculate a moment

Answer 2

Force is multiplied by the distance to the pivot

Question 3

It’s exist in two directions, one in an _____ Direction and the other In a _____ direction

Answer 3

Anti-clockwise

Clockwise

Question 4

When a system is _____ we can say that’s the Clockwise moment must equal the anticlockwise moment about the pivot

Answer 4

Equilibrium

Question 5

Set moments must be equal so we can write:

Answer 5

force x distance (clockwise) = force x distance (anticlockwise)

Question 6

Gears

Answer 6

gears can be used to transfer forces and motion from one object to another. Some gear systems can also be used to change the speed and direction of the motion.

Question 7

Teeth

Answer 7

Gears have teeth on them that interlock with teeth from other gears. When teeth from two gears are in contact, we say they are meshed. When three or more gears are used together they are called a gear train.

Question 8

How do gears turn

Answer 8

Gears turn on an axle, similar to a wheel.

Question 9

What two things can a gear system change?

Answer 9

Speed

Direction

Question 10

What type of gears meet at an angle

Answer 10

Bevel gears

Question 11

What type of gear uses a screw?

Answer 11

Worm gear

Question 12

How are gears and wheels similar?

Answer 12

Turn on axle

Question 13

How are gears and wheels different?

Answer 13

Gears have teeth

Question 14

If we turn the large gear around once, how many times will the small gear turn?

Answer 14

2

Question 15

Would the small gear turn faster or slower than the large gear

Answer 15

Faster

Question 16

If the small gear is turned twice, how many times would the large gear turn?

Answer 16

Once

Question 17

Will the large gear turn faster or slower than the small gear?

Answer 17

Slower

Question 18

How many times would you need to turn the small gear in order to make the large gear turn 7 times?

Answer 18

14

Question 19

If GEAR 1rotates clockwise twice ,what will GEAR 2do?

Answer 19

Rotations- 4

Direction- anti clockwise

Question 20

How does increasing the number of poly ropes affect the effort force

Answer 20

It reduces effort needed

Question 21

Is there a relationship between the number of ropes and the ratio?If so what is it

Answer 21

Same I.e 2 ropes halves effort

Question 22

What happens to the distance moved by the load compared to the amount of rope pulled by the effort force as the pulley systems get larger?

Answer 22

Less distance moved by load

Question 23

As more pulleys and rope is introduced to the system what other force starts to have a larger impact on the efficiency of the system?

Answer 23

Friction

Question 24

What is a pulley system

Answer 24

a force multiplier by increasing the number of ropes which support the load.