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Flashcards in Newton's Laws And Momentum Deck (19)
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0
Q

Newton’s first law of motion

A

A force is necessary to change to state of rest or of uniform motion in a straight line of a body

1
Q

State Newton’s second law of motion

A

The rate of change of the momentum of an object is directly proportional to the net force acting upon it

2
Q

Linear momentum

A

The mass of an object multiplied by it’s velocity

Vector

p=mv

Ft=mv-mu

3
Q

Define the Newton

A

One Newton is the force that gives a mass of one kilogram an acceleration of metre per second each second

4
Q

Newton’s third law

A

When body A exerts a force on body B, then body B exerts an a force that is equal, opposite in direction and of the same type

5
Q

The principle of the conservation of momentum

A

In any direction, in the absence of external forces, the total momentum of a system remains constant

6
Q

Impulse

A

Change in momentum of a body. F x change in t

Equal to the area beneath a force-time graph

7
Q

What is a perfectly elastic collision?

A

A collision in which no momentum or kinetic energy is lost

8
Q

What is an inelastic collision?

A

A collision in which momentum is conserved, but kinetic energy is not

9
Q

What is the formula for momentum, when combined with Newton’s Second Law?

A

F = (mv - mu) / t

10
Q

What is F x t?

A

Impulse

11
Q

What is force is equal to if F = (mv - mu) / t?

A

Impulse per second

12
Q

If we plot a graph of Force (y) against time (x), what will the area under the graph equal?

A

The impulse

13
Q

Define velocity

A

The rate of change of displacement of an object

14
Q

Define a closed system

A

A system of interacting objects where there are no external forces

15
Q

Define acceleration

A

The rate of change of velocity, measured in metres per second squared

Vector quantity

16
Q

Define weight

A

The gravitational force the Earth exerts on an object, pulling it towards the ground

17
Q

Define mass

A

The inertia of an object, or how difficult it an object

Mass is measured in kg, using SI units

18
Q

Define acceleration of free fall

A

The acceleration of a body falling under gravity

On Earth it has a value of 9.81 ms^-2