App. Physics - Work

For each of the following statements, identify the scientific meaning of work is intended.

1. A. Jack had to work against time as the deadline neared.

2. B. Jill had to work on her homework before she went to bed.

3. C. Jack did work carrying the pail of water up the hill.

• A

• B

• C

Determine whether work is being done in each of the following examples:

1. A. a train engine pulling a loaded boxcar initially at rest.

2. B. a tug of war that is evenly matched.

3. C. a crane lifting a car.

• A

• B

• C

Tags

NGSS.HS-PS3-2

For each of the following cases, indicate when the work done on the second object in each example will have a positive value.

1. A. The road exerts a friction force on a speeding car skidding to a stop.

2. B. A rope exerts a force on a bucket as the bucket is raised up a well.

3. C. Air exerts force on a parachute as the parachutist falls to Earth.

• A

• B

• C

For each of the following cases, indicate when the work done on the second object in each example will have a negative value.

1. A. The road exerts a friction force on a speeding car skidding to a stop.

2. B. A rope exerts a force on a bucket as the bucket is raised up a well.

3. C. Air exerts force on a parachute as the parachutist falls to Earth.

• A

• B

• C

Work is a form of energy

• True

• False

Units of work would be equivalent to a Newton times a meter.

• True

• False

 

Superman applies a force on a truck to prevent it from moving down a hill. This is an example of work being done.

• True

• False

 

An upward force is applied to a bucket as it is carried 20 m across the yard.

This is an example of work being done.

• True

• False

Tags

NGSS.HS-PS3-2

 

A force is applied by a chain to a roller coaster car to carry it up the hill of the first drop of the Shockwave ride.

This is an example of work being done.

• True

• False

 

The force of friction acts upon a softball player as she makes a headfirst dive into third base.

This is an example of work being done.

• True

• False