1. A puck of mass m spins around in a circular path on a table while connected to a string. The string is supported on the opposite end by a ball of mass 2m, hanging. There are no frictional forces. The radius of the path is R. What is the velocity of the puck as it relates to the other variables?
  2. √(mR/2)
  3. mgR/2
  4. √(mgR)
  5. 2R
  6. √(2gR)
  1. The system accelerates upward in the presence of gravity with an acceleration of magnitude 2g. Which could represent the tension on the bottom string?
  2. .5mg
  3. mg
  4. 2mg
  5. 3mg
  6. 7mg
  1. A mass is supported by two lines T1 and T2, as shown. If the tension on T2=20N, The tension on T1 is closest to______.
  2. 10N
  3. 12N
  4. 20N
  5. 34N
  6. 40N
  1. Two stars of equal mass revolve around each other in identical circular orbits (as shown) separated by a distance d. To maintain these orbits they move at speed V. If these stars were brought closer to distance d/4, what would be the speed required to maintain their new circular orbits, relative to V.
  2. .5V
  3. 2V
  4. 4V
  5. 8V
  6. 16V
  1. An object is falling from rest. Here the magnitude of the force of drag is as follows, FD=kv2. Here k is the constant associated with the drag and v is velocity. At the instant when the object reaches one half of the terminal velocity, the acceleration will be?
  2. .25g
  3. .33g
  4. .5g
  5. .75g
  6. g
  1. A plane accelerates upward near the earth in the same direction as the current velocity. Which vector would best indicate the direction of the average force from the seat on the pilot? (assume the pilot is only in contact with the seat and not the ground or controls) This force is labeled Fs.
  1. An object, starting from rest, experiences a single force in one direction according to the equation F=8t. The object has a mass of 4Kg. What is the velocity of the object after 3s?
  2. 2m/s
  3. 3m/s
  4. 9m/s
  5. 21m/s
  6. 27m/s
  1. An object falls from rest in the presence of air resistance. If the magnitude of air resistance is directly proportional to speed, which graph will best represent the acceleration of the object as a function of time? Assume the down direction is positive.

An object of mass M (bottom) is pulled with constant speed up an incline. The angle of the incline is Θ. There is a second mass m on top. The bottom interface between the incline and M is frictionless. There is just enough static friction between M and m to keep m from sliding. M>m

  1. Draw a free body diagram (down and on the right) showing and labeling all forces acting on mass M of appropriate magnitude and direction.

Solve the following two questions in terms of given variables and fundamental constants.

  1. What is the tension required to move the set of two boxes up the hill at a steady velocity?
  1. What is the current coefficient of static friction between the two boxes?
  1. Now assume m is bumped lightly and begins to slide down, while on the top of M. Tension is unchanging. How will acceleration magnitude compare for m and M? Provide a justification for your answer (mathematical or otherwise)
  1. There is friction between a block and the ground. Describe an experiment to determine the coefficient of kinetic friction between the two.

MaterialsExperiment design

  1. An object is falling from rest. Here the magnitude of the force of drag is as follows, FD=kv2. Here k is the constant associated with the drag and v is velocity. At the instant when the object reaches one half of the terminal velocity, the acceleration will be?
  2. .25g
  3. .33g
  4. .5g
  5. .75g
  6. g
  1. A plane accelerates upward near the earth in the same direction as the current velocity. Which vector would best indicate the direction of the average force from the seat on the pilot? This force is labeled Fs.
  1. An object, starting from rest, experiences a single force in one direction according to the equation F=8t. The object has a mass of 4Kg. What is the velocity of the object after 3s?
  2. 2m/s
  3. 3m/s
  4. 9m/s
  5. 21m/s
  6. 27m/s
  1. An object falls from rest in the presence of air resistance. If the magnitude of air resistance is directly proportional to speed, which graph will best represent the acceleration of the object as a function of time? Assume the down direction is positive.
  1. A puck of mass m spins around in a circular path on a table while connected to a string. The string is supported on the opposite end by a ball of mass 2m, hanging. There are no frictional forces. The radius of the path is R. What is the velocity of the puck as it relates to the other variables?
  2. √(mR/2)
  3. mgR/2
  4. √(mgR)
  5. 2R
  6. √(2gR)
  1. The system accelerates upward in the presence of gravity with an acceleration of magnitude 2g. Which could represent the tension on the bottom string?
  2. .5mg
  3. mg
  4. 2mg
  5. 3mg
  6. 7mg
  1. A mass is supported by two lines T1 and T2, as shown. If the tension on T2=20N, The tension on T1 is closest to______.
  2. 10N
  3. 12N
  4. 20N
  5. 34N
  6. 40N
  1. Two stars of equal mass revolve around each other in identical circular orbits (as shown) separated by a distance d. To maintain these orbits they move at speed V. If these stars were brought closer to distance d/4, what would be the speed required to maintain their new circular orbits, relative to V.
  2. .5V
  3. 2V
  4. 4V
  5. 8V
  6. 16V

An object of mass M (bottom) is pulled with constant speed up an incline. The angle of the incline is Θ. There is a second mass m on top. The bottom interface between the incline and M is frictionless. There is just enough static friction between M and m to keep m from sliding. M>m

  1. Draw a free body diagram (down and on the right) showing and labeling all forces acting on mass M of appropriate magnitude and direction.

Solve the following two questions in terms of given variables and fundamental constants.

  1. What is the tension required to move the set of two boxes up the hill at a steady velocity?
  1. What is the current coefficient of static friction between the two boxes?
  1. Now assume m is bumped lightly and begins to slide down, while on the top of M. Tension is unchanging. How will the acceleration of M compare to the acceleration of m. Provide a justification for your answer (mathematical or otherwise)
  1. There is friction between a block and the ground. Describe an experiment to determine the coefficient of kinetic friction between the two.

MaterialsExperiment design

A box slides up a ramp. Which could be a free body diagram for the motion?

Which could adequately indicate the direction of the net force and velocity vectors of the pendulum at the moment shown? (assume the pendulum is in motion)

  1. A pilot of mass makes takes his plane on a dive with a circular arch of radius R, as shown. Which could represent the normal force acing on the pilot by the seat?