FCHS Physics 1 Work Energy Power

Which of the following is not an example of work?

• Doing homework

• climbing the stairs

• pushing a box up a ramp

• lifting a pencil off the table

Which of the following use Joules as the unit?

• Energy

• Power

• Time

• Work

A student carries a stack of textbooks across the room without doing any work on the books. How is that possible?

• It isn't the student did work on the books

• The student did not exert any force on the books

• The student exerted a force on the books perpendicular to the direction of movement

• The student exerted a force on the books but did not move them.

A student pushed against the wall as hard as they could but did not do any work on the wall. How is this possible?

• It isn't, the student did work on the wall

• The student did not exert any force on the wall

• The student exerted a force on the wall perpendicular to the direction of movement

• The student exerted a force on the wall but did not move it

A student pushed a broom across the floor without doing any work on the broom. How is this possible?

• It isn't, the student did work on the broom

• The student did not exert any force on the broom

• The student exerted a force on the broom perpendicular to the direction of motion

• The student exerted a force on the broom but did not move it

Two springs are used in parallel to close a door. If k1=1.2 N/m and k2=1.5 N/m what is the effective spring constant?

• 2.7 n/m

• 1.8 N/m

• 0.67 N/m

• 1.5 N/m

Two springs are used in series to hang a sign. If k1=1.2 N/m and k2=1.5 N/m what is the effective spring constant?

• 2.7 n/m

• 1.8 N/m

• 0.67 N/m

• 1.5 N/m

The gravitational potential energy of an object is 150 J. What is the new energy if the mass is halved?

• 600 J

• 300 J

• 75 J

• 37.5 J

Tags

NGSS.MS-PS3-2

The gravitational potential energy of an object is 150 J. What is the new energy if the height is doubled?

• 600 J

• 300 J

• 75 J

• 37.5 J

Tags

NGSS.HS-PS3-1

The kinetic energy of an object is 150 J. What is the new energy if the mass is doubled?

• 600 J

• 300 J

• 75 J

• 37.5 J