Unit 3 Quiz 1 Review

​Unit 3 Quiz 1 - Energy

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Review​

Some text here about the topic of discussion

​Unit 3 Quiz 1 - Energy

​

Review​

Some text here about the topic of discussion

​What is on the test

Potential Energy - 14 questions. mult. choice

Kinetic Energy - 12 questions mult. choice

Conservation of energy - 2 questions. mult. choice

Concept Questions - 2 questions. mult choice

Essay Questions - 1

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Total - 31 questions​

​

Some text here about the topic of discussion

​Potential Energy

​The energy you possess by virtue of height above the ground

GPE = mgh

​

Multiple Choice

what is acceleration due to gravity for earth?

• 9.81m/s2

• 1.34m/s2

• 10m/s2

• 8.91m/s2

Multiple Choice

what 3 factors effect gravitational potential energy

• - Mass (m)

  -Weight (N)

  - speed (m/s)

• - Mass (N)

  - Height (km)

  - Acceleration due to gravity (g)

• - Mass (kg)

  - Height (m)

  - Acceleration due to gravity (g)

• - Mass

  - Height

  - Acceleration due to gravity

Open Ended

How much energy is stored in a 5.0 kg object that is   2.0 m above the ground?

Multiple Choice

__________ energy is stored energy.

• Potential

• Kinetic

• Force

• Gravity

Multiple Choice

At which point is potential energy greatest?

• W

• X

• Y

• Z

Multiple Choice

What energy does a rock at the edge of a cliff have?

• Potential

• Kinetic

Multiple Choice

What position has the least amount of potential energy?

• W

• X

• Y

• Z

Multiple Choice

A 20 kg box is lifted 6 m above the ground. How much GPE does it have?

• 120 J

• 200 J

• 1200 J

• 60 J

Multiple Choice

Which of the following statements about a skier skiing down a steep slope is true?

• His kinetic energy decreases and his potential energy increases

• His potential energy decreases and his kinetic energy increases

• His chemical energy increases

• Both his potential and kinetic energy increases

Multiple Choice

Which of the following statements is implied by the law of conservation of energy?

• Energy is static and unchanging.

• Energy only ever transforms or transfers.

• Energy will eventually run out.

• None of these.

Multiple Choice

An object falling from 50 m will have ______ potential than an object falling from 40 m.

• greater

• less

• equal

• lower

Multiple Choice

How much gravitational potential energy does a 100kg (220lb.) skydiver have if they jump from 4000 meters?

• 3920000 J

• 294 J

• 180000 J

• 1225 J

Multiple Choice

A 6kg cat misjudges a jump and falls 5 meters. How much gravitational potential energy does the cat have? (The cat is fine by the way.)

• 294 J

• 180000 J

• 1225 J

• 3920000 J

Multiple Choice

Calculate the potential energy of a car with a mass of 2,500 kg that is on a hill 100 meters above sea level.

• 250,000 J

• 2,450,000 J

• 2,451,663 J

• 248 J

Multiple Choice

What is the unit of measure

ment for E

• Newton

• Watt

• Joule

​Kinetic Energy

The energy of motion

1. KE = 1/2 mv²

2. An object has KE whenever it is moving

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Multiple Choice

A scientific law stating that energy cannot be created or destroyed.

• The Law of Potential Energy

• The Law of Kinetic Energy

• The Law of Conservation of Energy

Multiple Choice

If a 4 kg cat is running at 3 m/s what is its kinetic energy?

• 18 J

• 18

• 12

• 12 J

Multiple Choice

Which of the following objects has kinetic energy?

• A lamp that is turned off

• A bike parked at the top of a hill

• a ball thrown across the yard

• Fallen leaves laying on the ground below a tree

Multiple Choice

Which letter shows where kinetic energy is at is highest point?

• X

• Y

• W

• Z

Multiple Choice

All of the answer choices are examples of kinetic energy Except-

• A volleyball player spiking a ball

• A race car speeding down the highway

• A bowling ball sitting on the rack

• A bowling ball rolling down the alley

Multiple Choice

The faster an object moves, the ________ kinetic energy it has. 

• more

• less

Multiple Choice

Which has a greater impact on KE?

• mass

• speed

Multiple Choice

A 6kg cat misjudges a jump and falls 5 meters. How much gravitational potential energy does the cat have? (The cat is fine by the way.)

• 294 J

• 180000 J

• 1225 J

• 3920000 J

Multiple Choice

A 50kg (100lb) person is running at 7m/s (about 16 mph). How much kinetic energy do they have?

• 1225 J

• 180000 J

• 294 J

• 3920000 J

Multiple Choice

What is the unit of measure

ment for KE

• Newton

• Watt

• Joule

Multiple Choice

A cheetah can run briefly with a speed of 31 m/s. Suppose a cheetah with a mass of 47 kg runs at this speed. What is the cheetah’s kinetic energy?

• 1457 J

• 728.5 J

• 45,167 J

• 22,583.5 J

Multiple Choice

2. The diagram to the right represents a diver’s motion from the top of a high diving board into a pool of water. At what point does the diver have the greatest kinetic energy and the least potential energy?

• 1
• 2
• 3
• 4

Multiple Choice

The equation KE = 1⁄2 mass x velocity² is used to find which type of energy?

• Kinetic Energy

• Potential Energy

Fill in the Blank

Kinetic energy is directly proportional to speed squared. That means that if the speed is multiplied by 3, the kinetic energy is multiplied by ___

Open Ended

A 50 kg student is running at a speed of 4.0 m/s. 

How much kinetic energy does the student have?

Open Ended

A 900 kg car is driving at a speed of 30 km/hr. How much kinetic energy does it have?

Multiple Choice

A 1 kg bird flies south at 4 m/s. What is its KE?

• 2 m/s

• 8 J

• 2 J

• 4 J

Multiple Choice

How much kinetic energy does a moving 6 kg object have if it moves with a velocity of 3 m/s?

• 27 J
• 18 J
• 9 J
• 2 J

​Conservation of Energy

​Energy is neither created nor destroyed. It is converted to other forms of energy.

Some text here about the topic of discussion

Multiple Choice

When you put on the brakes of a bicycle, friction causes some of the mechanical energy to transfer to thermal energy.

• True

• False

Multiple Choice

According to the law of conservation of energy, energy can be created or destroyed.

• True

• False

Multiple Choice

According to the law of conservation of energy, the total amount of energy in the universe ____.

• remains constant

• changes constantly

• increases

• decreases

Multiple Choice

A ball is elevated some distance off the ground. If it has a mass of 3 kg and a potential energy of 90 J, how high off the ground is the ball?

• 2700 m

• 27.2 m

• 900 m

• 3.1 m

Multiple Choice

A 1.0 kg ball is stationary at the top of a hill that is 10.0 meters in height. The ball rolls all the way down the hill. What is its gravitational potential energy at the bottom of the hill?

• 0 joules

• 98 joules

• 49 joules

• 38 joules

Multiple Choice

A 6 kg ball has an initial velocity of 10 m/s. How high up the ramp will it go?

• 5.1 m

• 10 m
• 2.8 m

• 12 m

Multiple Choice

A 5 kg ball is lifted 12 m above the ground. It's gravitational potential energy is

• 60 J
• 600 J
• 17 J
• 2.4 J

Multiple Choice

A 1,000-kg car is driving down the road at 5 m/s. The driver increases the speed of the car to 10 m/s. What is the correct amount of the increase in the kinetic energy of the car?

• 12,500 J

• 50,000 J

• 37,500 J

• 25,000 J

Poll

How are you feeling about this quiz?

• Bring it on Mr. O

• Fair to Middlin'

• I got work to do

• Energy who