✅Physics PAPER2 forces

Question 1

What are the vector quantities

Answer 1

Force, velocity, acceleration

Question 2

What are the scaler quantities

Answer 2

Time, mass, speed, energy, temperature

Question 3

What do vector quantities have

Answer 3

A size and direction

Question 4

What do you scaler quantities have

Answer 4

Just have a size

Question 5

What is a force

Answer 5

A force is a push or pull that acts on an object

Question 6

What is a contact force

Answer 6

When two objects or touching for a force to act

Question 7

What is a noncontact force

Answer 7

When objects aren’t touching for the force to act

Question 8

What are examples of non-contact forces

Answer 8

Magnetic force, gravitational force, electrostatic force

Question 9

What are examples of contact forces

Answer 9

Friction, air resistance, tension

Question 10

What is an interaction pair

Answer 10

When the forces on two objects are equal in size but act in opposite directions

Question 11

Give an example of and interaction pair

Answer 11

The gravitational attraction between the Earth and the Sun

Question 12

Define weight

Answer 12

The force acting on an object due to gravity

Question 13

What is the weight of an object depend on

Answer 13

It’s mass and strength of the gravitational field it’s in

Question 14

What is weight measured in

Answer 14

Newtons

Question 15

How do you calculate the weight of an object

Answer 15

Weight= mass x gravitational field strength

Question 16

Calculate the weight in newtons of a 5kg mass on Earth with 9.8 newtons

Answer 16

9.8 N/kg x 5kg = 49N

Question 17

What is a resultant force

Answer 17

The overall force on a point or object

Question 18

How can you find the resultant force

Answer 18

Add together forces acting in the same direction, take away any going in the opposite direction

Question 19

A trolley is pulled by two children one child pose the trolley with a fourth of 5 N to the left the other poles the trolley with a fourth of 10 N to the right what is the resultant force?

Answer 19

F= 10N - 5N = 5N

Question 20

What happens when a force moves an object through a distance

Answer 20

Energy is transferred and work is done on the object

Question 21

Doing work against frictional forces causes energy to be transferred to what energy store

Answer 21

Thermal energy store of the object

Question 22

Give an example of a frictional force that causes temperature of the object to increase

Answer 22

When you push something along a rough surface for example of carpet

Question 23

What is the equation for how much work has been done

Answer 23

W= Force x distance(in metres)

Question 24

A fourth of 20N pushes an object 20cm work out the work done on the object

Answer 24

20 x 0.2 = 4

Question 25

What three things can transfer energy

Answer 25

Bending, compressing, stretching

Question 26

What is it called when objects can go back to its original shape after a force has been removed

Answer 26

Elastically deformed

Question 27

Give an example of an elastically deformed object

Answer 27

A spring

Question 28

What is the equation to work on what a force is

Answer 28

Force = Spring constant(in metres) x extension(in metres)

Question 29

The spring is fixed at one end, and a force of 1 Newton is applied to the other end, causing it to stretch. The spring extends by 2 cm calculate the spring constant of the spring

Answer 29

1 N divided by 0.02 m = 50 N/m

Question 30

What happens on a graph when the relationship is nonlinear

Answer 30

The straight line begins to bend

Question 31

Explain the required practical to investigate the link between force and extension

Answer 31

Measure the mass of each mass, calculate it away, measured the original length of the spring, Adam asked for the sprint and allow it to come to rest, record the force and measure the new length of the spring, repeat until you’ve added all the masses and then plot of force extension graph of your results

Question 32

What is the equation for how to find the extension

Answer 32

New length - original length

Question 33

How do you calculate distance

Answer 33

Distance in metres= speed in m/s x Time in seconds

Question 34

Sprinter runs 200 m in 25 seconds calculate the speed

Answer 34

200 m divided by 25 seconds = 8 m/s

Question 35

What is acceleration

Answer 35

The change in velocity in a certain amount of time

Question 36

How can you find the acceleration

Answer 36

Acceleration (metres) = change in velocity metres per second divided by time taken in seconds

Question 37

The steeper The distance on a graph means the

Answer 37

The faster it’s going

Question 38

What does a straight uphill section mean on a graph

Answer 38

Steady pace it is travelling at

Question 39

The flat section on a graph is at stationary please which means

Answer 39

It’s stopped

Question 40

What does a curve represent on a graph

Answer 40

Going up it means acceleration going down it means deceleration

Question 41

How do you calculate the gradient on a graph

Answer 41

Choose two points and the change in the vertical axis divided by the change in the horizontal axis

Question 42

What is newtons in second law

Answer 42

The force acting on an object and the acceleration of the object are directly proportional

Question 43

What is Newton‘s third law

Answer 43

When two objects interact the forces they exert on each other are equal and opposite

Question 44

What will happen to skater A when she pushes on skate B

Answer 44

She feels an equal and opposite forth from skate of his hand, both skaters feel the same sized force in opposite directions so then they accelerate from each other

Question 45

The practical to investigate how mass and force affect acceleration

Answer 45

Mark a starting line on the table the trolley is on, this is so that the trolley always travels the same distance to the light gate, place the trolley on the starting line, hold the trolley so the string is tight and not touching the table, and release it, and record the acceleration measured by the light gate as the trolley passes through

Question 46

In the experiment above what force is accelerating the trolley

Answer 46

The hook with the masses on it

Question 47

How do you calculate stopping distance

Answer 47

Stopping distance = thinking distance+ Breaking distance

Question 48

What is thinking distance

Answer 48

How far the vehicle travels during the drive as reaction time

Question 49

What is breaking distance

Answer 49

Distance taken to stop under the braking force

Question 50

What factors affect thinking distance

Answer 50

Drugs, alcohol, eyesight, phones

Question 51

What factors affect stopping distance

Answer 51

Rain, roads surfaces, tires, brakes

Question 52

What does inelastically deformed mean

Answer 52

When a spring will not go back to its original length when the force is removed

Question 53

The greater the speed the greater the

Answer 53

Breaking distance

Question 54

explain how you can measure reaction time with the ruler drop test

Answer 54

A partner drops a ruler unexpectedly between your finger and thumb As soon as you see it move you catch it and use the scale to see how far it falls