Work and Energy Worksheet

What is the concept that is being used in calculating or solving the work done by a force on a system?

• dot product

• cross product

• vector product

• integration

Which of the following quantities tell us how much energy has been transferred to an object?

• work

• force

• scalar

• vectors

What is the SI unit for work?

• joules

• newton

• meters

• kilograms

When will the scalar product be equal to zero?

• If the angle between the two vectors is equal to 90 degrees

• If the angle between the two vectors is equal to 60 degrees

• If the angle between the two vectors is equal to 30 degrees

• If the angle between the two vectors is equal to 45 degrees

What would be the value of the work done by a kid as she pushes her chair forward?

• positive

• negative

• zero

• undetermined

What would be the work done on a dumbbell as you lift it up and down?

• negative

• positive

• zero

• undetermined

Which of the following directions of force and displacement would result in a zero work?

Which physical quantity is directly associated with kinetic energy?

• velocity

• displacement

• force

• time

Which of the following has no kinetic energy?

• A security guard standing still.

• A girl running around the school.

• A bouncing ball.

• A bicycle moving along the road.

If an object is moving and doubles its speed, what would happen to its kinetic energy?

• It will be four times higher.

• It will stay the same.

• It will double.

• It will be decreased.