AP Physics 1 Bootcamp Review!

"If we apply a ___________ to an object, its __________________ will change and it will  ______________."

• force, accelerate, gravity
• accelerate, inertia, gravity
• force, velocity, accelerate
• velocity, gravity, inertia

An object weighing 300 N is suspended by means of two cords, as shown above. The tension in the horizontal cord is

• 0 N

• 150 N

• 210 N

• 300 N

• 400 N

Three blocks of masses 3m, 2m, and m are connected to strings A, B, and C as shown above. The blocks are pulled along a rough surface by a force of magnitude F exerted by string C. The coefficient of friction between each block and the surface is the same. Which string must be the strongest in order not to break?

• A

• B

• C

• They must all be the same strength

• It is impossible to determine without knowing the coefficient of friction

A skier slides at constant speed down a slope inclined at an angle ϕ to the horizontal, as shown above. If air resistance is negligible, the coefficient of friction µ between the skis and the snow is equal to

• 1/tanϕ

• 1/cosϕ

• sinϕ

• cosϕ

• tanϕ

The graph above shows the velocity v as a function of time t for an object moving in a straight line. Which of the following graphs shows the corresponding displacement x as a function of time t for the same time interval?

• 
• 
• 
• 
• 

Two 0.60-kilogram objects are connected by a thread that passes over a light, frictionless pulley, as shown above. The objects are initially held at rest. If a third object with a mass of 0.30 kilogram is added on top of one of the 0.60-kilogram objects as shown and the objects are released, the magnitude of the acceleration of the 0.30-kilogram object is most nearly

• 10.0 m/s/s

• 6.0 m/s/s

• 3.0 m/s/s

• 2.0 m/s/s

• 1.0 m/s/s

One end of a string is fixed. An object attached to the other end moves on a horizontal plane with uniform circular motion of radius R and frequency f. The tension in the string is Fs . If both the radius and frequency are doubled, the tension is

• 1/4 F_s

• 1/2 F_s

• 2 F_s

• 4 F_s

• 8 F_s

A person walking along a straight line moves such that her velocity as a function of time can be represented by the graph above. At what time does the person have the same position as she had at time t = 0?

• At t = 5 s

• During the interval 5 s < t < 8 s

• At t = 8 s

• During the interval t > 8 s

The Earth pulls downward on a pingpong ball with a force of 1N. If this is the "action" force, what is the "reaction" force?

• The ground exerts a force of 1N on the ping pong ball

• The ping pong ball pulls up on the Earth with a force of 1 N

• The ping pong ball pushes down on the earth with a force of 1N

• The is no reaction force when a gravitational force is involved

A 80 kg skydiver is free falling at a constant velocity of 19 m/s. What is the net (total) force acting on her?

• 1,520 N
• 0 N
• 4.21 N
• Not enough information to answer