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Physics > Work, Energy, Power > Flashcards

Work, Energy, Power Flashcards

1
Q

Deals with the concepts that are needed to describe motion

A

Kinematics

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2
Q

Deals with the effect that forces have on motion

A

Dynamics

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3
Q

It is a push or pull that causes an object to move, stop or change direction

A

Force

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4
Q

Forces are often due to?

A

strings, ropes, cables , friction, muscle effort, etc.

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5
Q

SI Unit for force

A

1N (neuton)

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6
Q

Who stated the Newton’s Law of Motion

A

Isaac Newton

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7
Q

Where did Isaac Newton stated the law of motion

A

Philosphiae Naturalis Principia Mathematica in 1687

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8
Q

Newton used the law of motion to?

A

investigate and explain the motion of objects

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9
Q

What is the 1st law of motion

A

an object at rest will remain at rest

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10
Q

It is the tendency of an object to resist changes in its velocity: whether in motion or motionless

A

Inertia

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11
Q

What is the 2nd law of motion

A

Law of Acceleration

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12
Q

What is the formula for the 2nd law of motion

A

F = MA

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13
Q

What is the 3rd Law of Motion

A

Law of Action and Reaction

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14
Q

Pictures that show the size and direction of all force acting on an object

A

Free - Body Diagram

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15
Q

It acts to oppose sliding motion between surfaces

A

Friction force

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16
Q

Contact force exerted by a surface on an object

A

Normal force

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17
Q

Exerted by a string, rope, or cable when attached to a body & pulled

A

Tension force

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18
Q

Long - range force due to gravitational attraction between two objects, generally earth & an object

A

Weight Force

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19
Q

It is a direction of force parallel to surface and opposite direction of sliding

A

Friction force

20
Q

It is a direction of force perpendicular to & away from the surface

A

Normal force

21
Q

It is a direction of force away from object and parallel to spring, rope or cable at point of attachment

A

Tension force

22
Q

It is a direction of force straight down toward center of Earth

A

Weight force / Gravity force

23
Q

A type of friction force that keeps an object from moving

A

Static friction

24
Q

A type of friction for a moving object

A

Kinetic friction

25
Q

It is proportional to the magnitude of the normal force exerted on an object by the surface

A

Coefficient of Friction

26
Q

How much matter an object contains

A

Mass

27
Q

Force exerted on a mass by gravity

A

Weight

28
Q

It is constant for an object

A

Mass

29
Q

It is dependent on the gravity of the place

A

Weight

30
Q

Unit of Mass

A

Kilogram/ Kg

31
Q

Unit of Weight

A

Newton/ N

32
Q

Force in direction of motion is what matters

A

Work

33
Q

It is a component of force that does not cause the block to move

A

Vertical Component

34
Q

It is a component of force actually do work

A

Horizontal Component

35
Q

It has the ability to do work

A

Energy

36
Q

When work is done on an object, the object’s ______

A

energy changes

37
Q

It is the energy of motion

A

Kinetic Energy

38
Q

It is the energy of position or condition

A

Potential Energy

39
Q

It is the change of energy

A

Work

40
Q

It is the total amount of energy in the universe remains the same

A

Conservation of Energy

41
Q

It is the sum of the kinetic and potential energies of an object

A

Mechanical Energy

42
Q

A measure of how quickly work is done

A

Power

43
Q

The faster work is done, the greater the ____

A

Power

44
Q

Unit of Power

A

Watt (W)

45
Q

Unit of Work

A

Joules (J)

46
Q

Formula for weight (Fg)

A

mass times gravity

Physics (2 decks)

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