Forces and their affects

Question 1

What is force measured in ?

Answer 1

The newton , N

Question 2

What force is made from the cyclists tyre?

Answer 2

Friction

Question 3

What force is acting down on the bike as it is being used

Answer 3

Weight

Question 4

What happens to a moving object if the reaultent force is zero?

Answer 4

It keeps moving

Question 5

What happens to a moving object if the resultent force is not zero

Answer 5

It speeds up the direction of the resultant force

Question 6

If we double the resultant force,What happens to the acceleration?

Answer 6

It doubles aswell

Question 7

If the same resultant force was applied on a 1kg ball,2kg ball or a 4kg ball,which would have the most acceleration?

Answer 7

1kg as it is the lightest

Question 8

Force=mass x ?

Answer 8

Acceleration

Question 9

Acceleration= force÷ ?

Answer 9

Mass

Question 10

Mass x acceleration=?

Answer 10

Force

Question 11

How much force is needed to give an acceleration of 2 m/s to a 4 kg box?

Answer 11

4x2 = 8N

Question 12

4N is applied to a 2kg object. What is the acceleration?

Answer 12

4÷2= 2m/s

Question 13

What force is needed to give a acceleration of 10m/s to a 250g box ?

Answer 13

250g × 10m/s = 2.5N

Question 14

A car travels 100m in 5 seconds . what is the average speed?

Answer 14

100m÷5 seconds = 20 m/s

Question 15

On a distance time graph,what does a horizontal line represent ?

Answer 15

A stationary object

Question 16

What does a horizontal line on a velocity time graph represent ?

Answer 16

Constant velocity

Question 17

A car accelerates from rest to 30 m/s in 15 seconds . what is its acceleration ?

Answer 17

30 m/s ÷15 seconds = 2m/s2

Question 18

What does the gradient on a distance time graph represent ?

Answer 18

The speed

Question 19

What does the gradient on a velocity time graph represent?

Answer 19

The acceleration

Question 20

What does the area under the velocity time graph represent ?

Answer 20

The distance travelled

Question 21

What is thinking distance?

Answer 21

The distance travelled between the need for breaking and when the brakes start to act

Question 22

What is breaking distance?

Answer 22

The time taken for the car to come to a halt at once the brakes have been applied

Question 23

When driving a car, thinking distance can be increased by?

Answer 23

Being alert

Question 24

When driving a car,stopping distance can be increased by ?

Answer 24

Driving fast

Question 25

When driving a car, breaking distance can be increased by ?

Answer 25

Poor brakes

Question 26

In which direction does friction act ?

Answer 26

The opposite direction to movement

Question 27

What force clauses objects to fall ?

Answer 27

Weight

Question 28

When an object reaches terminal speed,the vertical forces on it are?

Answer 28

Balanced

Question 29

On the moon, if I dropped a hammer and a feather at the same time,which would hit the ground first?

Answer 29

Both hit it at the same time

Question 30

A parachutist on the moon would never reach terminal speed because:

Answer 30

There is no air on the moon, so no air resistance

Question 31

If a sky diver changed from a vertical to a horizontal position during free fall, what would happen to his terminal speed ?

Answer 31

It would decrease

Question 32

When the parachute canopy is opened more drag is created because:

Answer 32

It has a large surface area

Question 33

Weight = mass x ?

Answer 33

Gravity

Question 34

Mass X gravity=?

Answer 34

Weight

Question 35

Weight divided by gravity=?

Answer 35

Mass

Question 36

An astronaut has a mass of 100kg. What is his weight on the moon if the gravitational field strength there is 1.6N/Kg?

Answer 36

100x1.6= 160N

Question 37

Gravity is always rounded to ?

Answer 37

10

Question 38

What is the weight of a 500g object on earth ?

Answer 38

500g=0.5kg | 0.5x10=5N

Question 39

Elastic objects can store elastic potential energy when they are:

Answer 39

Stretched or squashed

Question 40

When an elastic object is changed from its original shape:

Answer 40

Work is done

Question 41

Until a certain limit is reached,hooks law states that:

Answer 41

That the extension of the elastic object is directly proportional to the force applied

Question 42

Force= spring constant x ?

Answer 42

Extension

Question 43

Spring constant x extension = ?

Answer 43

Force

Question 44

F=K x e | What do all the letters stand for?

Answer 44

F=force K=spring constant E=extension

Question 45

A spring with k= 10N/m is stretched from 0.2m to 0.5m the force needed is:

Answer 45

0.5-0.2=0.3 | So F=10 x 0.3 =3N

Question 46

What happens to the total momentum of a firework when it explodes?

Answer 46

It stays the same