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Mech Science > Motion, Force, Energy And Power > Flashcards

Motion, Force, Energy And Power Flashcards

1
Q

What is force

A

Force is that which changes or tries to change the state of the body

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2
Q

What is mass

A

Quantity of matter contained within a body

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3
Q

What is gravity

A

Gravitational force is a force that pulls an object to a the ground

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4
Q

What is weight

A

The force with which the body is attracted to the centre of the earth

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5
Q

What is a scalar quantity

A

Magnitude only ( 80kg or 10 seconds )

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6
Q

What is a vector quantity

A

Magnitude and direction ( 25 m/s south )

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7
Q

What is velocity

A

The rate of change of distance with respect to time

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8
Q

What is acceleration

A

The rate of change of velocity with respect to time

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9
Q

What is density

A

Amount of mass with respect to unit volume

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10
Q

What is pressure

A

Amount of force acting on a unit area

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11
Q

What is linear motion

A

Is motion in a straight line

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12
Q

What are the linear motion terms

A 
Initial velocity
Final velocity
Acceleration
Distance
Time
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13
Q

What is a radian

A

Angle between two radii drawn from the end of an arc

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14
Q

What is rotary motion described as

A

Rpm
Revs/ second
Degrees/ second
Radians/ second

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15
Q

What is a resultant

A

The single force that can replace all other forces and perform the same amount of force as them

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16
Q

What is an equilibrant

A

The single force which is equal to magnitude

17
Q

What is Newton’s first law

A

The body will remain at rest in a straight line unless it is acted upon by an external force

18
Q

What is Newton’s 2nd law

A

If the body is acted upon an external force the rate of change of momentum is proportional to that force

19
Q

What is Newton’s 3rd law

A

It is the equal and opposite force

20
Q

What is energy

A

It is the capacity or ability to work

21
Q

What can you change in energy

A

Only change it’s form

22
Q

What is potential energy

A

The energy of position

23
Q

What is kinetic energy

A

Moving energy

24
Q

What is power

A

The rate of doing work

Mech Science (5 decks)

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