Why does the total amount of mechanical energy stay constant in a system?

energy is not created or destroyed

energy is not converted from one form into another

Which statement does not illustrate power?

A principal sitting on a chair while observing several classes all day.

A farmer plowing the rice field all day.

A Siberian husky pulling a sled all day.

A teacher encoding his power point presentation in his laptop all day.

A roller coaster whose average speed is 32 m/s is at the top of a 72m hill and weighs 966N. At the top of the hill the coaster car has ___________________ energy.

both kinetic and potential energy

Which does not illustrate kinetic energy?

It depends upon the objects’ mass and objects’ height.

It depends upon the objects’ mass and speed.

It is the energy an object possesses due to its motion.

Who has the most power?

Mrs Punzalan who used 50N force to inoculate mushrooms at a speed of 2m/s.

Ms Criza who encodes her observation tools using 12000J of work in 20 minutes.

Sir Pau who studies his 5 lessons for the next classes in 15 minutes.

Mrs Masalunga who watches her learners while taking their quiz in 30 minutes.

Which statement illustrates work done?

A rolling marble hits a note card and moves it across a table.

A weightlifter holds a barbell above her head.

A teacher applies a force to a wall and becomes exhausted.

A waiter carries a tray full of meals across a dining room at a constant speed.

A weightlifter holds a 100 kg barbell above her head. Is work done?

No because no displacement occurred.

Yes because there is a force applied to the barbell and the force causes a displacement of the barbell.

Yes because there is an upward force applied to the barbell and the barbell moves vertically.

No because there is no force applied.

A light plastic cart and a heavy steel cart are both pushed with the same force for a distance of 1.0 m, starting from rest. After the force is removed, the kinetic energy of the light plastic cart is ________ that of the heavy steel cart.

can't say unless we know how big the force is

the force applied causes the object's motion.

Work Energy Power

Authored by bridget moore

Physics

11th Grade

NGSS covered

Used 79+ times

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MULTIPLE CHOICE QUESTION

2 mins • 1 pt

How do you calculate power?

P = W/t

P = E/t

P = w * t

P = bbq/chicken

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

How do we calculate work?

W = F * d

w = f * D

W = F * D

w = f * d

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

How much work is being done with 200 N of force over 426 meters?

85,200 J

45,620 J

90,480 J

62,329 J

Tags

NGSS.HS-PS3-1

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

The energy of movement is...?

Kinetic

Potential

Tags

NGSS.MS-PS3-5

NGSS.MS-PS3-1

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Energy that is stored is called...

Kinetic

Potential

Tags

NGSS.MS-PS3-2

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

The SI unit for power is...?

Watts

Joules

Newtons

Meters

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

What is the formula for Kinetic Energy?

PE = m*g*h

KE = 1/2m*v2

W = F*d

P = W/t

Tags

NGSS.MS-PS3-5

NGSS.MS-PS3-1

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Work Energy Power

How do you calculate power?

How do we calculate work?

How much work is being done with 200 N of force over 426 meters?

The energy of movement is...?

Energy that is stored is called...

The SI unit for power is...?

What is the formula for Kinetic Energy?

A force exerted over a distance to move an object is ______________________.

If 150 Joules of work is needed to move a box 10 meters, what force was used?

If 68 Joules were necessary to move a 4 Newton crate, how far was the crate moved?

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