Motion and Forces

Question 1

What is a scalar quantity?

Answer 1

Quantities that have magnitude but no direction.

Question 2

What is vector quantity?

Answer 2

Quantities that have magnitude and direction.

Question 3

List the scalar quantities (6)

Answer 3

• Time
• Speed
• Distance
• Mass
• Energy
• Temperature

Question 4

List the vector quantities (6)

Answer 4

• Displacement
• Acceleration
• Momentum
• Force
• Weight
• Velocity

Question 5

Walking speed

Answer 5

1.5m/s

Question 6

Running Speed

Answer 6

3m/s

Question 7

Cycling speed

Answer 7

6m/s

Question 8

Cars speed

Answer 8

13-30m/s

Question 9

Plane speed

Answer 9

250m/s

Question 10

sound in air speed

Answer 10

340m/s

Question 11

Train speed

Answer 11

50m/s

Question 12

Acceleration Definition

Answer 12

Change in velocity in a certain time. How quickly you are speeding up.

Question 13

What does a straight line on a distance time graph mean?

Answer 13

Steady speed

Question 14

What does a flat line on a distance time graph mean?

Answer 14

Stopped

Question 15

What does a curved steep line on a distance time graph mean?

Answer 15

Acceleration

Question 16

What does a leveling off curved line mean on a distance time graph?

Answer 16

Deceleration

Question 17

How do you find the speed on a distance time graph when the line is straight?

Answer 17

The gradient. Change in y / change in x

Question 18

How do you find the speed on distance time graph when the line is curved?

Answer 18

Find the tangent of the specific area. The find the gradient of that.

Question 19

What does the gradient mean on a velocity time graph?

Answer 19

Acceleration

Question 20

What does a straight uphill line on a velocity time graph mean?

Answer 20

Constant acceleration

Question 21

What does a straight downhill line on a velocity time graph mean?

Answer 21

Constant deceleration

Question 22

What does a curved line on a velocity time graph mean?

Answer 22

Change in acceleration or deceleration

Question 23

What does a flat line on velocity time graph mean?

Answer 23

Steady speed

Question 24

How do you calculate the distance on a velocity time graph?

Answer 24

The area underneath

Question 25

What is newtons first law?

Answer 25

If the resultant force on a moving object is zero the object will continue to move at a constant velocity. If the a stationary object has a resultant force of zero the object will remain stationary.

Question 26

What is newtons second law?

Answer 26

- force = mass x acceleration - acceleration is directly proportional to force - acceleration is inversely proportional to mass

Question 27

Mass definition

Answer 27

How much matter is in an object. Measured in kilograms/kg. Scalar quantity.

Question 28

Weight defintion

Answer 28

Is the force on an object due to gravity. Measured in newtons/N. Vector quantity.

Question 29

What is a centripetal force?

Answer 29

The force is moving in circles at a different velocity the force is always acting towards the centre if the circle.

Question 30

What is the meaning of inertia mass?

Answer 30

Measures how difficult it is to change the velocity of an object.

Question 31

What is Newtons third law?

Answer 31

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

Question 32

Explain the conservation of momentum

Answer 32

- Momentum after = Momentum before in a closed system.

Question 33

Force equation | with momentum

Answer 33

Change in momentum / time

Question 34

Explain stopping distance

Answer 34

Thinking distance + braking distance

Question 35

What affects the thinking distance?

Answer 35

- Tiredness - Distractions - Alcohol - Drugs

Question 36

What affects the braking distance

Answer 36

- The road conditions if old - If icy or wet - The tires - The weather - The condition of the car

Question 37

How do you calculate thinking distance?

Answer 37

Distance = speed x time

Question 38

How do you calculate braking distance?

Answer 38

1/2 x mass x velocity^2 = force x distance

Question 39

How do you find the speed on a curved line?

Answer 39

Draw a tangent and calculate the gradient

Question 40

What is thinking distance?

Answer 40

The distance the car travels in the drivers reaction time

Question 41

What is braking distance?

Answer 41

The distance taken to stop once the brakes have been applied

Question 42

What is momentum?

Answer 42

A property that all moving objects have.

Question 43

What is the conservation of momentum?

Answer 43

In a closed system, the total momentum before an event is the same after the event