Questions from College Physics

Q: Refer to Problems 11–14. Find the final speed of

Refer to Problems 11–14. Find the final speed of the sliding crate if the frictional force on the sliding crate has magnitude 19.4 N.

Q: A pellet is fired from a toy cannon with a velocity of

A pellet is fired from a toy cannon with a velocity of 12 m/s directed 60° above the horizontal. After 0.10 s, a second pellet is fired with the same initial velocity. After an additional 0.15 s have...

Q: A pendulum of length 75 cm and mass 2.5 kg

A pendulum of length 75 cm and mass 2.5 kg swings with a mechanical energy of 0.015 J. What is the amplitude?

Q: To measure the airspeed of a plane, a device called a

To measure the airspeed of a plane, a device called a Pitot tube is used. A simplified model of the Pitot tube is a manometer with one side connected to a tube facing directly into the â€&#...

Q: Each of five pendulums has a bob of mass m suspended from

Each of five pendulums has a bob of mass m suspended from a string of length L. Rank them in order of their frequency for small- amplitude oscillations, greatest to smallest. (a) m = 300 g, L = 1.10 m...

Q: A U-shaped tube is partly filled with water and partly

A U-shaped tube is partly filled with water and partly filled with a liquid that does not mix with water. Both sides of the tube are open to the atmosphere. What is the density of the liquid (in g/cm3...

Q: A physics teacher draws a cutaway view of a car rounding a

A physics teacher draws a cutaway view of a car rounding a banked curve as a rectangle atop a right triangle. A student draws a coordinate system on the drawing. Is there another choice of axes that w...

Q: A pendulum (mass m) moves according to x = A

A pendulum (mass m) moves according to x = A sin ωt. (a) Write the equation for vx(t) and sketch one cycle of the vx(t) graph. (b) What is the maximum kinetic energy?

Q: If the skier of Example 6.6 is moving at 12

If the skier of Example 6.6 is moving at 12 m/s at the bottom of the trail, calculate the total work done by friction and air resistance during the run. The skier’s mass is 75 kg.

Q: Atmospheric pressure is equal to the weight of a vertical column of

Atmospheric pressure is equal to the weight of a vertical column of air, extending all the way up through the atmosphere, divided by the cross-sectional area of the column. (a) Explain why that must...