WORK ENERGY POWER

Work is defined as

• product when a force act on an object and its move the object at certain distance

• type of job need to do

• something that need power

• product of energy

The unit of work is

• watt

• hertz

• joule

• pascal

The equation for work is

• work = power x mass

• work = power / time

• work = force x distance

• work = distance x time

A student needs 10 Newtons of force to lift a box to the top of a 2 meter shelf. How much work do they do?

• 12 J

• 8 J

• 20 J

• 5 J

Tags

NGSS.MS-PS2-4

NGSS.MS-PS3-2

NGSS.MS-PS3-4

A soccer player kicks a ball with 20 Newtons of force causing it to travel 100 meters. How much work is done on the ball?

• 200 J

• 80 J

• 5 J

• 2000 J

A worker climbs a ladder and does 8 J of work on a 2 N object. What is the distance they lift the object?

• 18 m

• 4 m

• 10 m

• 6 m

The equation for POTENTIAL ENERGY is

• PE = mass x gravity x height

• PE = gravity x weight

• PE = height / work

• PE = work / time

Tags

NGSS.MS-PS3-2

The equation for KINETIC ENERGY is

• KE = mass x gravity

• KE = 1/2 height x speed

• KE = mass²

• KE = 1/2 mass x speed²

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-4

NGSS.MS-PS3-5

The ability to do work is cause change:

• work

• energy

• momentum

• power

Which of these items is not part of the law of conservation of energy?

• energy cannot be created

• energy cannot be destroyed

• energy can be transferred between forms

• energy is destroyed by friction

Tags

NGSS.MS-PS3-5