Work and Energy Review

State whether the everyday or scientific meaning of the word work is intended in the statement, “I did some work on my physics project over the weekend.”

• everyday

• scientific

Place a check next to each situation in which work is done by the object in italics on the object in bold?

• A soccer ball rolls along the grass and comes to a stop.

• A construction worker holds a bucket of plaster directly overhead as he walks across the construction site.

• A weightlifter holds a barbell in place above his head.

• A well-mannered child pushes his chair under the table.

Place a check next to each situation in which negative work is done by the object in italics on the object in bold?

• A soccer ball rolls along the grass and comes to a stop.

• A construction worker holds a bucket of plaster directly overhead as he walks across the construction site.

• A weightlifter holds a barbell in place above his head.

• A well-mannered child pushes his chair under the table.

You did work to move a desk. Mr. Tancraitor moves the desk over the same distance but pushes with only one-fourth of the force. How does the amount of work Mr. Tancraitor did on the desk compare to the amount of work you did on the desk?

• Mr. Tanc did 4 times less work.

• Mr. Tanc did half as much work.

• Mr. Tanc did twice as much work.

• Mr. Tanc did 4 times more work

Tags

NGSS.HS-PS3-2

Which of the following is the ability of a physical system to do work?

• potential energy

• energy

• kinetic energy

• spring constant

An object has kinetic energy due to its _____.

• motion

• position

• net force

• acceleration due to gravity

Tags

NGSS.HS-PS3-1

NGSS.HS-PS3-2

An object has potential energy due to its _____.

• speed

• net force

• motion

• position

Tags

NGSS.MS-PS3-2

Place a check next to each factor that affects an object's kinetic energy.

• acceleration due to gravity

• speed

• spring constant

• mass

You threw a football so it had some kinetic energy. Mr. Tancraitor throws the same football but at double the speed. How does the kinetic energy of the football thrown by Mr. Tancraitor compare to the kinetic energy of the football thrown by you?

• Mr. Tanc's football has 4 times less kinetic energy.

• Mr. Tanc's football has half as much kinetic energy.

• Mr. Tanc's football has twice the kinetic energy.

• Mr. Tanc's football has 4 times more kinetic energy.

Tags

NGSS.HS-PS3-2

You hold a physics textbook above the floor so it has some gravitational potential energy. Mr. Tancraitor holds the same physics textbook at one-third of the height you did. How does the gravitational potential energy present in the physics textbook when held by Mr. Tancraitor compare to the gravitational potential energy of that same textbook when held by you?

• The textbook has 9 times less gravitational potential energy when Mr. Tanc holds it.

• The textbook has 3 times less gravitational potential energy when Mr. Tanc holds it.

• The textbook has 3 times more gravitational potential energy when Mr. Tanc holds it.

• The textbook has 9 times more gravitational potential energy when Mr. Tanc holds it.

Tags

NGSS.MS-PS3-2