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CC-2426 Physics Content > Mechanics > Flashcards

Mechanics Flashcards

1
Q

What is rectilinear motion

A

Motion along a straight path

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2
Q

What is Instantaneous velocity

A

The velocity at an instant

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3
Q

What is formula for average velocity

A

average velocity=displacement/time

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4
Q

What is the formula for acceleration

A

acceleration=change in velocity/time

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5
Q

What does SUVAT stand for

A

S=displacement
U=initial velocity
V=final velocity
A=acceleration
T=time

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6
Q

What is the 1st SUVAT equation

A

V=u+at

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7
Q

What is the 2nd SUVAT equation

A

s=(u+v)t/2

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8
Q

What is the 3rd suvat equation

A

s=ut+1/2*at^squared

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9
Q

What is the 4th SUVAT equation

A

v^squared-u^squared=2as

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10
Q

What is Free fall

A

In the absence of air resistance, all objects will fall freely with the same acceleration

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11
Q

If an object is thrown upwards it will be accelerating downwards at___

A

9.8ms^-1

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12
Q

Objects projected horizontally will___

A

still fall freely with a vertical downward acceleration of 9.8ms^-1

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13
Q

In the vertical plane the object will accerlate__

A

down at 9.8ms^-1 and the horizontal velocity remains constant

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14
Q

What is the formula for horizontal displacement

A

Horizontal displacement=constant horizontal velocity * time

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15
Q

What is the formula for initial velocity in the vertical component

A

initial velocity(vertical component)=u*sinθ

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16
Q

What is the formula for initial velocity in the horizontal component

A

initial velocity(horizontal component)=u*cosθ

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17
Q

For objects projected at an angle to the horizontal the___

A

vertical and horizontal motion should be treated separately by using vertical and horizontal components

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18
Q

For a displacement time graph the gradient is the__

A

velocity

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19
Q

What is the formula for instantaneous velocity

A

instantaneous velocity=Δs/Δt

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20
Q

For a velocity time graph the gradient is the__

A

acceleration

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21
Q

what is the formula for displacement at constant velocity

A

displacement(constant velocity)= velocity * time

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22
Q

What is the formula for displacement for an accelerating object

A

displacement(accelerating object)=base*height/2

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23
Q

What is the formula for displacement for any velocity time graph

A

displacement(for any velocity time graph)= area

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24
Q

What is Linear momentum

A

The product of a body’s mass and velocity

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25
Q

What is the formula for momentum

A

momentum=mass*velocity

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26
Q

What is the conservation of momentum

A

The total momentum before event=The total momentum after event

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27
Q

What is the formula for conservation of momentum

A

Mau=(Ma+Mb)*V

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28
Q

What is the formula for impulse force

A

Impulse force=change in momentum

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28
Q

What is the formula for the resultant

A

resultant=change in momentum/time interval

29
Q

What is Recoil

A

When two objects are pushing one another apart

30
Q

The area under a force-time graph for collisions represents

A

the change in momentum

31
Q

The resultant force exerted on a body is__

A

directly proportional to the rate of change of linear momentum

32
Q

Momentum can have a___

A

negative value if the object is travelling in the opposite direction

33
Q

What is gravitational field strength

A

The force per unit mass on an object placed in a gravitational field

34
Q

What is the formula for gravitational field strength

A

gravitational field strength=force/mass

35
Q

What is the formula for weight

A

weight=mass*gravitational field strength

36
Q

What is tension

A

When objects are subjected to a stretching force, the molecular forces try to restore the object to its original length

37
Q

What is Newton’s 1st law of motion

A

An object will remain in a state of rest or continue to move with a constant velocity unless acted upon by a resultant external force

38
Q

A body is in equilibrium if___

A

when acted on by a number of forces, the resultant force is zero

39
Q

What is center of gravity

A

The point at which the weight of the object can be said to act

40
Q

What is the formula for resultant force for a fixed mass

A

resultant force=mass*acceleration

41
Q

What is Newton’s 2nd law

A

The acceleration of a body of constant mass is proportional to the resultant force applied to it

42
Q

What is Newton’s 3rd law

A

If body A exerts a force on body B, body B will exert an equal and opposite force on body A

43
Q

What is a moment

A

The turning effect of a force

44
Q

What is the formula for moments

A

moment=force*perpendicular distance

45
Q

What is the principle of moments

A

If a system is in equilibrium, the sum of the clockwise moments must equal the sum of the anticlockwise moments

46
Q

What is a couple

A

The resultant moment of a pair of equal forces in opposite directions

47
Q

What is the formula for a couple

A

couple=magnitude of each force*perpendicular separation of their lines of motion

48
Q

What is torque

A

The turning effect due to two or more forces

49
Q

What is work

A

When the point of application of a force is moved in the direction of the force

50
Q

What are the 3 formulas for work done

A

work done=forcedistance
work done=horizontal componenthorizontal displacement
work done=average force*displacement

51
Q

What is Energy

A

The ability to do work

52
Q

Energy is transferred to an object when___

A

Work is done on it

53
Q

When does an object have energy

A

When it has the ability to do work

54
Q

What is potential energy

A

The ability of an object to do work by virtue of its position or state

55
Q

What is formula for GPE

A

Egrav=massgravitational field strengthheight

56
Q

What is gravitational potential energy

A

The energy an object possesses by virtue of its position in a gravitational field

57
Q

What is Elastic potential energy

A

The ability of an object to do work by virtue of a change in its shape

58
Q

What is formula for Elastic potential energy

A

EPE=average force*extension

59
Q

What is Kinetic energy

A

The ability of an object to do work by virtue of its motion

60
Q

What is the formula for kinetic energy

A

KE=1/2mass(velocity)^squared

61
Q

What is the formula for Kinetic energy if a mass changes speed

A

ΔKE=1/2mass(final velocity)^squared - 1/2mass(initial velocity)^squared

62
Q

What is internal energy

A

The sum of the KE and potential energy in a system

63
Q

What is chemical energy

A

The ability to do work using chemical reactions

64
Q

What is nuclear energy

A

The ability to do work by changes in the constitution of nuclei

65
Q

What is Electrostatic potential energy

A

The energy of a charged particle by virtue of its position in an electrical field

66
Q

What is Radiant energy

A

Energy transferred by electromagnetic waves

67
Q

What is the principle of conservation of energy

A

Energy cannot be created or destroyed

68
Q

What is the formula for efficiency

A

Efficiency=(Useful power output/energy power input)*100

69
Q

What is efficiency

A

The ability to transfer the input energy to useful energy

70
Q

What are the formulas for power

A

power=Energy transferred/time
power=force * velocity

CC-2426 Physics Content (3 decks)

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