to use all UBQ features!

Physics UBQ

Supercharge Your Learning with 1000+ AP Level Physics Problems
0%
Phy UBQ Count Message Here
Intermediate
Mathematical
GQ

On a strange, airless planet, a ball is thrown downward from a height of \( 17 \, \text{m} \). The ball initially travels at \( 15 \, \text{m/s} \). If the ball hits the ground in \( 1 \, \text{s} \), what is this planet’s gravitational acceleration?

Advanced
Mathematical
FRQ

A system consists of two small disks, of masses m and 2m, attached to ends of a rod of negligible mass of length 3x. The rod is free to turn about a vertical axis through point P. The first mass, m, is located x away from point P, and therefore the other mass, of 2m, is 2x from point P. The two disks rest on a rough horizontal surface; the coefficient of friction between the disks and the surface is . At time t = 0, the rod has an initial counterclockwise angular velocity ωi about P. The system is gradually brought to rest by friction.

Derive an expressions for the following quantities in terms of µ, m, x, g, and ωi.

Intermediate
Conceptual
MCQ

Two blocks of ice, one five times as heavy as the other, are at rest on a frozen lake. A person then pushes each block the same distance d. Ignore friction and assume that an equal force F is exerted on each block. Which of the following statements is true about the kinetic energy of the heavier block after the push?

Intermediate
Mathematical
MCQ

Alcohol has a specific gravity of \( 0.79 \). If a barometer consisting of an open-ended tube placed in a dish of alcohol is used at sea level, to what height in the tube will the alcohol rise?

Intermediate
Mathematical
GQ

A coffee cup on the dashboard of a car slides forward when the driver decelerates from \( \frac{45 \, \text{km}}{\text{h}} \) to rest in \( 3.5 \) seconds or less. What is the coefficient of static friction between the cup and the dash? Assume the road and the dashboard are level (horizontal).

Intermediate
Conceptual
MCQ

Angular momentum cannot be conserved if

Intermediate
Mathematical
MCQ

An object undergoing simple harmonic motion has a maximum displacement of \( 6.2 \) \( \text{m} \) at \( t = 0.0 \) \( \text{s} \). If the angular frequency of oscillation is \( 1.6 \) \( \text{rad/s} \), what is the object’s displacement when \( t = 3.5 \) \( \text{s} \)?

Intermediate
Conceptual
MCQ

What condition(s) are necessary for static equilibrium?

Intermediate
Mathematical
FRQ

The graph above shows the angular velocity of a spinning wheel (radius = \( 25 \) \( \text{cm} \)) as a function of time.

Intermediate
Conceptual
MCQ

The figure shows a truck pulling three crates across a rough road. Which of the following best describes the directions of all the horizontal forces acting on crate 2?

Intermediate
Mathematical
FRQ

A seagull first flies \( 160 \, \text{m} \) North, then heads \( 120.65 \, \text{m} \) at \( 18.43^\circ \) North of West. After it lands:

Intermediate
Conceptual
MCQ

A block sliding down an frictionless inclined plane is experiencing both gravitational and normal forces; which force’s magnitude changes when the angle of the incline is increased?

Nerd Notes

Discover the world's best Physics resources

Continue with

By continuing you (1) agree to our Terms of Sale and Terms of Use and (2) consent to sharing your IP and browser information used by this site’s security protocols as outlined in our Privacy Policy.

Sign In to View Your Questions

We use site cookies to improve your experience. By continuing to browse on this website, you accept the use of cookies as outlined in our privacy policy.