暗記メーカー

Work, Power, and Energy

Work, Power, and Energy

18問 • 1年前

問題一覧

1

______ is a measure of the energy transfer that occurs when a force acts on an object and causes it to move a certain distance in the direction of the force. Work is a scalar quantity.

Work

2

Formulas for calculating Work • along a straight line • x axis •y axis

• w = fd • w = fdcos¢ • w = fdsin¢

3

what are the units of work

Joule (J) Calorie (heat)

4

work is the product of the ___ and ____ in the direction of force.

force, displacement

5

Work is a scalar force

True

6

✓ If the force and the displacement are in the same direction, the work is _____, indicating that energy is being transferred to the object.

positive

7

✓ If they are in opposite directions, the work is _____, indicating that energy is being taken away from the object.

negative

8

✓ If the force and the displacement are perpendicular, the work done is ____, as there is no net energy transfer in the direction of motion

zero

9

In physics, ____ is the rate at which work is done or the rate at which energy is transferred or converted. It measures how quickly energy is generated or consumed. In other words, it tells you how fast work is being done

Power

10

Formula for calculating power

P = w/t work time P = Fv force velocity

11

SI UNIT OF POWER

Watts

12

1 W (watts) = ___

1 J/s (joule per second)

13

1 kwh (kilowatt per hour) = ____ and ___

1000 watts and 1 h

14

1 horsepower= ____

746 watts

15

____ is the ability to do work or cause a change in a physical system.

Energy

16

Forms of Energy: 1) _____: The energy an object possesses due to its motion 2) _____: The energy an object possesses due to its position or state je.g., gravitational potential energy or elastic 3) _____. The internal energy of a substance due to the random motion of its atoms and molecules. 4) ______: The energy stored in the chemical bonds of substances. 5) _______: The energy associated with the movement of electrons in an electric circuit. 6) ______: The energy stored in the nucleus of an atom. 7) ______: The sum of an object's kinetic and potential energy.

Kinetic Potential Thermal/Heat Chemical Electrical Nuclear Mechanical

17

Formula for calculating Energy

KE= 1/2 mv² KE =kinetic energy mass velocity GPE = mgh mass of gravitational force acceleration due to gravity height above reference point

18

SI UNIT OF ENERGY

Joules calorie electron volt

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問題一覧

1

______ is a measure of the energy transfer that occurs when a force acts on an object and causes it to move a certain distance in the direction of the force. Work is a scalar quantity.

Work

2

Formulas for calculating Work • along a straight line • x axis •y axis

• w = fd • w = fdcos¢ • w = fdsin¢

3

what are the units of work

Joule (J) Calorie (heat)

4

work is the product of the ___ and ____ in the direction of force.

force, displacement

5

Work is a scalar force

True

6

✓ If the force and the displacement are in the same direction, the work is _____, indicating that energy is being transferred to the object.

positive

7

✓ If they are in opposite directions, the work is _____, indicating that energy is being taken away from the object.

negative

8

✓ If the force and the displacement are perpendicular, the work done is ____, as there is no net energy transfer in the direction of motion

zero

9

In physics, ____ is the rate at which work is done or the rate at which energy is transferred or converted. It measures how quickly energy is generated or consumed. In other words, it tells you how fast work is being done

Power

10

Formula for calculating power

P = w/t work time P = Fv force velocity

11

SI UNIT OF POWER

Watts

12

1 W (watts) = ___

1 J/s (joule per second)

13

1 kwh (kilowatt per hour) = ____ and ___

1000 watts and 1 h

14

1 horsepower= ____

746 watts

15

____ is the ability to do work or cause a change in a physical system.

Energy

16

Forms of Energy: 1) _____: The energy an object possesses due to its motion 2) _____: The energy an object possesses due to its position or state je.g., gravitational potential energy or elastic 3) _____. The internal energy of a substance due to the random motion of its atoms and molecules. 4) ______: The energy stored in the chemical bonds of substances. 5) _______: The energy associated with the movement of electrons in an electric circuit. 6) ______: The energy stored in the nucleus of an atom. 7) ______: The sum of an object's kinetic and potential energy.

Kinetic Potential Thermal/Heat Chemical Electrical Nuclear Mechanical

17

Formula for calculating Energy

KE= 1/2 mv² KE =kinetic energy mass velocity GPE = mgh mass of gravitational force acceleration due to gravity height above reference point

18

SI UNIT OF ENERGY

Joules calorie electron volt