A toy roller coaster has mass 5 kg, and rolls along a toy coaster track with only gravity doing work.  It begins at the highest point from rest, then drops vertically 2 m to the lowest point Point B, and then ascends 1 m to Point C.  What is speed at Point C in m/s?

If the pressure of a gas increases at constant temperature, what happens to it’s volume?

Which best describes the magnetic field lines of a bar magnet?

A 10kg and a 5kg mass exert forces on one another, with no other forces acting. Which is true?

A bat strikes a ball initially headed in the positive direction.  The ball reverses direction after impact.  The initial speed of the ball is 4 m/s, it’s mass is 0.5 kg, and it’s diameter is 0.1 m.  What is the magnitude of the ball’s momentum before impact, in SI units?

A walnut drops from the branch of a very tall walnut tree.  The only force acting on it is gravity.  How far does it fall in 1s?

A 100kg mass is placed in water.  How much of it’s volume is submerged when it stops sinking?

Resistor 1 has larger resistance than Resistor 2. They are connected to identical batteries (same voltage). Which one consumes more power?

Pressure and volume, one one side, and the number of particles and temperature, on the other side, of a hot gas, are equivalent because:

For a gas at finite pressure, the processes which increase the internal energy of a gas are: