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Advanced
Mathematical
MCQ

An astronaut initially at rest in space throws a wrench, and recoils in the opposite direction. Select all that is true.

Intermediate
Mathematical
FRQ

A projectile of mass 0.750 kg is shot straight up with an initial speed of 18.0 m/s.

Advanced
Mathematical
FRQ

A diver descends from a salvage ship to the ocean floor at a depth of \(35 \text{ m}\) below the surface. The density of ocean water is \(1.025 \times 10^3 \text{ kg/m}^3\).

Intermediate
Mathematical
FRQ

A batter hits a fly ball which leaves the bat \( 0.90 \) \( \text{m} \) above the ground at an angle of \( 61^\circ \) with an initial speed of \( 28 \) \( \text{m/s} \) heading toward centerfield. Ignore air resistance.

Intermediate
Mathematical
FRQ

You throw a rock straight up with an initial velocity of \( 5.0 \, \text{m/s} \).

Beginner
Conceptual
MCQ

What does an object’s velocity describe?

Advanced
Mathematical
MCQ

A boy of mass \( m \) and a girl of mass \( 2m \) are initially at rest at the center of a frozen pond. They push each other so that she slides to the left at speed \( v \) across the frictionless ice surface and he slides to the right. What is the total work done by the children?

Intermediate
Mathematical
GQ

A \(350\ \text{g}\) ball is attached to the end of a thin, uniform rod of mass \(500\ \text{g}\) and length \(1.2\ \text{m}\). The system is rotated in a horizontal circle about the opposite end of the rod. Calculate the moment of inertia of the system about the axis of rotation. Hint: the moment of inertia of a thin rod about the end of the rod is \(I = \tfrac{1}{3} m L^2\).

Intermediate
Mathematical
GQ

A car travels at a constant speed around a circular track whose radius is \(2.6 \, \text{km}\). The car goes once around the track in \(360 \, \text{s}\). What is the magnitude of the centripetal acceleration of the car?

Intermediate
Conceptual
MCQ

A constant force of strength \( 20 \) \( \text{N} \) acts on an object of mass \( 3 \) \( \text{kg} \) as it moves a distance of \( 4 \) \( \text{m} \). If this force is applied perpendicular to the \( 4 \) \( \text{m} \) displacement, the work done by the force is equal to:

Beginner
Conceptual
MCQ

The moment of inertia of a body depends on

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