Newton's Laws of Linear Motion

Question 1

What is Newton’s first law?

Answer 1

An object will not change its motion unless acted on by an unbalanced force.

Question 2

What is Newton’s second law?

Answer 2

Force = Mass x Acceleration (F=MA)

Question 3

What is Newton’s third law?

Answer 3

Every action has an equal and opposite reaction.

Question 4

Which law is the law of Inertia?

Answer 4

Newton’s 1st law.

Question 5

Which law is the law of Acceleration?

Answer 5

Newton’s 2nd law.

Question 6

Which law is the law of Action and Reaction?

Answer 6

Newton’s 3rd law.

Question 7

Which of Newton’s laws is applied here:

A golf ball will sit on its tee until a large enough force is applied to move it.

Answer 7

Newton’s 1st law.

Question 8

What are Newton’s three laws of linear motion?

Answer 8

1 - Law of inertia
2 - Law of acceleration
3 - Law of action and reaction

Question 9

Which law does this statement describe?

‘An object will not change its motion unless acted in by an unbalanced force.’

Answer 9

1st law

Question 10

What is meant by impulse?

Answer 10

The amount of time you are in contact with an object.

Question 11

Which of Newton’s laws is applied here:

The sprinter applying force into the ground will receive the same force exerted back on them.

Answer 11

Newton’s 3rd law.

Question 12

Which of Newton’s laws is being described here:

The QB is stationary in the pocket and is hit backwards by a DL who brakes the line of scrimmage.

Answer 12

The 1st Law.

Question 13

What is the equation for impulse?

Answer 13

F(Δt)

Question 14

Which of Newton’s laws is being described here:

The RB is running and the force that he exerts into the ground is also exerted on him from the ground.

Answer 14

The 3rd Law.

Question 15

What is the equation for Force?

Answer 15

F = MA
Force = Mass x Acceleration

Question 16

Which of Newton’s laws is being described here:

During kicking, the mass of the ball is constant so the acceleration determines the force.

Answer 16

The 2nd Law.

Question 17

What is meant by inertia?

Answer 17

The reluctance of the body to move or change its state of motion​.

Question 18

If two rugby players (one light and one heavy) are running at the same speed, which will be harder to tackle?

Answer 18

The larger, heavier player will be more difficult than the smaller, lighter player​ as he has a greater inertia.

Question 19

What is the relationship between the size of an object and the size of its inertia?

Answer 19

The bigger the mass of an object the harder it is to move and therefore the greater the quantity of inertia.

Question 20

Is the following statement scalar or vector:

A car is travelling at 30mph in a north-easterly direction​.

Answer 20

Vector, this is because we have information on its magnitude and its direction​.

Question 21

What is a scalar quantity?

Answer 21

A quantity which is fully described by magnitude (size) alone.

Question 22

T / F:

The greater the matter, the bigger the mass.

Answer 22

True.

Question 23

Compare the mass of a shot putt and a table tennis ball.

Answer 23

A shot putt has a greater mass than a table tennis ball as it is greater in density and volume

Question 24

Is the following statement scalar or vector:

A car is travelling at 30mph.

Answer 24

Scalar as it gives us information on the magnitude (or speed) of the car, but no info on direction​.

Question 25

What is meant by mass?

Answer 25

Mass is the quantity of matter a body possesses.

Question 26

What is meant by weight?

Answer 26

Weight is the force exerted on the mass of the body by gravity​

Question 27

What is a vector quantity?

Answer 27

A quantity which is fully described by both magnitude and a direction

Question 28

Is weight a scalar of vector quantity?

Answer 28

Vector quantity as weight always acts downwards and has a magnitude.

Question 29

How is weight measured?

Answer 29

Newtons (N).

Question 30

Is mass a scalar or vector quantity?

Answer 30

Scalar quantity as no direction.

Question 31

What happens to a persons mass and weight as they go from earth to the moon?

Answer 31

Your mass remains the same, but the weight is 1/6th as the gravity of the moon is 1/6th that of earth.

Question 32

How is mass measured?

Answer 32

Grams (g) or Kilograms (Kg).

Question 33

What is distance?

Answer 33

The amount of ground an object covers during its motion​.

Question 34

T / F: | Mass of an object always remains the same at any place.

Answer 34

True.

Question 35

Is distance a scalar or vector quantity?

Answer 35

Scalar.

Question 36

Compare the distance and displacement of a 400m track runner.

Answer 36

``` Distance = 400m. Displacement = 0m. ```

Question 37

Is speed a scalar or vector quantity?

Answer 37

Scalar.

Question 38

Is displacement a scalar or vector quantity?

Answer 38

Vector.

Question 39

What is displacement?

Answer 39

How far the position of the object has changed as a result of the motion.

Question 40

How is distance measured?

Answer 40

Metres (m).

Question 41

What is velocity?

Answer 41

The rate of change of displacement.

Question 42

What is the calculation for speed?

Answer 42

Speed = Distance / Time

Question 43

Is velocity a scalar or vector quantity?

Answer 43

Vector.

Question 44

What is speed?

Answer 44

The rate of change in distance. or The body’s movement per unit of time and no direction​.

Question 45

What is the calculation for velocity?

Answer 45

Displacement / Time

Question 46

How is speed measured?

Answer 46

ms^-1

Question 47

How is velocity measured?

Answer 47

ms^-1

Question 48

How is displacement measured?

Answer 48

Metres (m).

Question 49

Give a sporting example of when distance and displacement are the same.

Answer 49

100metre dash in a straight line.

Question 50

Give a sporting example of when distance and displacement are different.

Answer 50

1 mile track run: | 1 mile distance and 0m displacement.

Question 51

What is momentum?

Answer 51

The product of the mass and velocity of an object.

Question 52

What is the calculation for momentum?

Answer 52

Momentum = Mass x Velocity

Question 53

What is the calculation for change in velocity?

Answer 53

(Final velocity - Initial velocity) / Time

Question 54

Give a sporting example from a team game where acceleration is an important quantity.

Answer 54

Rugby -> Lose a defender. Hockey -> Mark an attacker. Football -> Chase a loose ball. Cricket -> Field a boundary.

Question 55

How is acceleration calculated?

Answer 55

Acceleration = Change in velocity / Time

Question 56

If a prop has a mass of 125kg and is running with a velocity of 10.0 m/s, what is the momentum of the prop running?

Answer 56

1250kgm/s | 125kgx10.0m/s

Question 57

When can momentum be conserved?

Answer 57

When the object is in flight as neither mass nor velocity can be altered (unless acted on by an external force).

Question 58

What is the measurement for momentum?

Answer 58

Kgm/s

Question 59

When chipping in golf, when is momentum conserved?

Answer 59

When the ball is in flight, the mass and velocity cannot be altered.

Question 60

Is momentum a scalar or vector quantity?

Answer 60

Vector: | The calculation uses velocity which is a vector quantity itself.

Question 61

T / F: | Momentum can be conserved.

Answer 61

True - it can be conserved when it is in flight.

Question 62

What is the measurement for acceleration?

Answer 62

m/s^2

Question 63

How is force calculated?

Answer 63

F = mass x acceleration

Question 64

When does friction force occur?

Answer 64

When a solid surface of a body moves while in contact with the solid surface of another body.

Question 65

Is force a scalar or vector quantity?

Answer 65

Force is a vector.

Question 66

What is air resistance?

Answer 66

The force acting in the opposite direction to the motion of a body travelling through air.

Question 67

Which force opposes acceleration? (not decceleration)

Answer 67

Air resistance.

Question 68

Ashleigh starts running on the starting pistol. She runs the 100 metres in 12 seconds. How fast was Ashleigh?

Answer 68

8.33 m/s.

Question 69

Bill starts running from the 25 metre mark. He reaches the finish line (100m line) in 15 seconds. How fast was Bill?

Answer 69

5 m/s.

Question 70

Dennis runs the full 100 metres at 11 metres per second. He started running at the sound of the staring pistol. How long did it take Dennis?

Answer 70

9.09 s.

Question 71

Elliot started running at the starting pistol at 8 metres per second, but gave up after 7 seconds. How far did Elliot run?

Answer 71

56 m.