Newtons Laws Flashcards

1
Q

What is force

A

Force is the push or pull of an object

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2
Q

What is a contact force

A

Forces that take place when objects interact with eachother

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3
Q

What is a Non contacts force

A

Forces that take place without objects interacting with eachother

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4
Q

Examples of contact forces

A
  • air resistance
  • tension
  • friction
  • normal force
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5
Q

What is an interaction pair and what are the rules

A

Interaction pairs are pairs of forces that are the same size and type, act in opposite directions and on different objects

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6
Q

What is Newton’s first law

A

An object at rest will stay at rest and an object in motion will stay in motion and at a constant velocity unless acted upon by an external force.

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7
Q

What is inertia?

A

Inertia is the tendency for motion to remain unchanged and could also apply to a motionless object

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8
Q

How do you find the resultant force?

A

F (force) = M (mass) x A (acceleration )
(N). (Kg). (M/s^2)

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9
Q

How do you find the inertial mass?

A

Inertial mass = resultant force / acceleration

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10
Q

What is inertial mass?

A

Inertial mass is the ratio of resultant force over acceleration

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11
Q

What is Newton the second law?

A

The net (resultant) force of an object is directly directly proportional to its acceleration

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12
Q

What is one Newton?

A

The force required to accelerate one kg of mass at one meter per second squared

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13
Q

What is Newton’s third law?

A

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

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14
Q

How do you find the weight?

A

Weight = mass X gravitational field strength

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15
Q

What is the relationship between mass and weight?

A

If something has a mass of 1Kg, it has a weight of 10 newtons on earth

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16
Q

What is the definition of weight?

A

Weight is a force caused by gravity

17
Q

What is mass?

A

Is the amount of substance within an object

18
Q

What is momentum?

A

Momentum is the product of mass and velocity and is a vector

19
Q

What is the equation for momentum?

A

Momentum = mass X velocity
Kgm/s. Kg. m/s

20
Q

What is conservation of momentum?

A

As long as no external force is acting on the object the total momentum before the collision is equal to the total momentum of the object after the collision.

21
Q

How to find force using momentum

A

Force = (final momentum - initial momentum) / time taken for change
N. Kgm/s. S

22
Q

What is work done equal to?

A

Energy transferred

23
Q

How to find work done using force and distance

A

Work done = force X distance
(J). (N). (m)

24
Q

What is the rule for work done?

A

Work done is always done against another force

25
Q

What is power?

A

Power is the measure of how fast energy has been transferred

26
Q

Equation for power

A

Power = work done / time taken
(J/s). (J). (s)