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Beginner
Mathematical
GQ

Marc’s favorite ride at Busch Gardens is the Flying Umbrella, which is lifted by a hydraulic jack. The operator activates the ride by applying a force of \( 72 \) \( \text{N} \) to a \( 30 \)\( \text{cm}^2 \) cylindrical piston, which holds the \( 20,000 \)\( \text{N} \) ride off the ground. What is the area of the piston that holds the ride?

Intermediate
Conceptual
MCQ

Which statements are not valid for a projectile? Take up as positive.

Intermediate
Mathematical
FRQ

A rescue helicopter lifts a 79 kg person straight up by means of a cable. The person has an upward acceleration of 0.70 m/s2 and is lifted through a distance of 11 m.

Intermediate
Proportional Analysis
MCQ

Wheels \( A \) and \( B \) are connected by a moving belt and are both free to rotate about their centers. The belt does not slip on the wheels. The radius of Wheel \( B \) is twice the radius of Wheel \( A \). Wheel \( A \) has constant angular speed \( \omega_A \) and Wheel \( B \) has constant angular speed \( \omega_B \). Which of the following correctly relates \( \omega_A \) and \( \omega_B \)?

Advanced
Proportional Analysis
MCQ

An object weighs \( 432 \) \( \text{N} \) on the surface of Earth. At a height of \( 3R_{\text{Earth}} \) above Earth’s surface, what is its weight?

Advanced
Mathematical
GQ

A ball is dropped off a high cliff, and \( 2 \) \( \text{s} \) later another ball is thrown vertically downward with an initial speed of \( 30 \) \( \text{m/s} \). How long will it take the second ball to overtake the first?

Beginner
Mathematical
MCQ

The components of vector \( \vec{E} \) are: \( E_x = -34.8 \) and \( E_y = -23.6 \). What is the measure of the angle, in degrees, formed by vector \( \vec{E} \) and the \( +x \)-axis?

Intermediate
Mathematical
MCQ

When the mass of a simple pendulum is tripled, the time required for one complete vibration

Intermediate
Mathematical
MCQ

In which of the following is the particle’s acceleration constant?

Beginner
Conceptual
GQ

Only \( 1 \) non-zero force acts on an object. Can the object have \( 0 \) acceleration? Can it have \( 0 \) velocity? Explain.

Intermediate
Conceptual
MCQ

Which statement is true about the distances the two objects have traveled at time \( t_f \)?

Intermediate
Conceptual
MCQ

A solid sphere \( \left( I = \frac{2}{5}MR^2 \right) \) and a solid cylinder \( \left( I = \frac{1}{2}MR^2 \right) \), both uniform and of the same mass and radius, roll without slipping at the same forward speed. It is correct to say that the total kinetic energy of the solid sphere is

Advanced
Mathematical
GQ

The axle (the black dot) in Figure 1 is half the distance from the center to the rim. Suppose \( d = 30 \) \( \text{cm} \). What is the torque that the axle must apply to prevent the disk from rotating? Express your answer in newton-meters. Use positive value for the counterclockwise torque and negative value for the clockwise torque.

Intermediate
Mathematical
MCQ

A solid disk has a mass \( M \) and radius \( R \). What is the moment of inertia about an axis that is perpendicular to the plane of the disk and passes through its edge? Hint: the moment of inertia about the disk center is given as \(I_{center}=\frac{1}{2}M R^{2}\).

Beginner
Conceptual
MCQ

An object in simple harmonic motion obeys the following position versus time equation: \( y = (0.50 \text{ m}) \sin \left( \frac{\pi}{2} t \right) \). What is the amplitude of vibration?

Intermediate
Mathematical
FRQ

A particle moves according to the equation, where \( x \) is in \( \text{m} \) and \( t \) is in \( \text{s} \).

Beginner
Mathematical
GQ

A person stands on a scale in an elevator. If the scale reads \( 600 \, \text{N} \) when that person is riding upward at a constant velocity of \( 4 \, \text{m/s} \), what is the scale reading when the elevator is at rest? Hint: The reading on the scale is simply the normal force.

Beginner
Conceptual
MCQ

The Moon does not crash into the Earth because:

Intermediate
Mathematical
MCQ

A mechanical wheel initially at rest on the floor begins rolling forward with an angular acceleration of \( 2\pi \, \text{rad/s}^2 \). If the wheel has a radius of \( 2 \, \text{m} \), what distance does the wheel travel in \( 3 \) seconds?

Intermediate
Mathematical
GQ

The driver of a car traveling at \( 30.0 \) \( \text{m/s} \) applies the brakes and undergoes a constant negative acceleration of \( 2.00 \) \( \text{m/s}^2 \). How many revolutions does each tire make before the car comes to a stop, assuming that the car does not skid and that the tires have radii of \( 0.300 \) \( \text{m} \)?

Beginner
Mathematical
GQ

A skydiver reaches a terminal velocity of \(55.0\, \mathrm{m/s}\). At terminal velocity, the skydiver no longer accelerates. The mass of the skydiver and her equipment is \(87.0\, \mathrm{kg}\). What is the force of friction acting on her?

Intermediate
Conceptual
MCQ

An object is projected vertically upward from ground level. It rises to a maximum height \( H \). If air resistance is negligible, which of the following must be true for the object when it is at a height \( H/2 \) ?

Intermediate
Mathematical
MCQ

A horizontal uniform rod of length L and mass M is pivoted at one end and is initially at rest. A small ball of mass M (same masses) is attached to the other end of the rod. The system is released from rest. What is the angular acceleration of the rod just immediately after the system is released?

Beginner
Conceptual
GQ

According to Newton’s third law, each team in a tug of war pulls with equal force on the other team. What, then, determines which team will win?

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