Pre AP Physics Semester 2 Exam Part A

In which of the following situations do your arms do work on books?

• holding a heavy stack of books while standing
• carrying a heavy stack of books
• dropping a stack of books onto a table
• picking up a pile of books from the floor

How much work is done in holding a 15 N sack of potatoes while waiting in line at the grocery store for 3 minutes?

• 15 J
• 45 J
• 0 J
• 5 J

Mr. B's and Mr. P's classes competed in a game of tug of war. Mr. B's class pulled to the right with a force of 4,000 N. Mr. P's class pulled to the left with a force of 5,000 N. As a result the rope moved 5.1 m to the left. How much work was done by the net force?

• 4100 J

• 3100 J

• 5100 J

• 45900 J

Which are correct units for work?

• N x s

• N x m

• J/s

• W

What is the weight of an object if 75 J of work is done to lift it uniformly 6.0 m

• 13 N
• 450 N
• 1.3 kg
• 130 kg

What is the equation for work?

• W = mass * acceleration
• W = force * distance
• W = force/distance
• W = speed/time

If the velocity of an automobile is doubled, its kinetic energy...

• Decreases to one-half

• doubles

• decreases to one-fourth

• quadruples (four times)

which point has the most kinetic energy

• A

• B

• C

• F

Gravitational potential energy depends on the ________ and ________ of the object. 

• Height and mass
• Friction and movement
• Mass and Movement
• Height and Friction 

Energy due to motion is ____________ energy. 

• Potential 
• Energy
• Kinetic
• Friction