Questions from College Physics

Q: If a feather and a lead brick are dropped simultaneously from the

If a feather and a lead brick are dropped simultaneously from the top of a ladder, the lead brick hits the ground first. What would happen if the experiment is repeated on the surface of the Moon?

Q: If the cylinder rotates at 300.0 rev/min,

If the cylinder rotates at 300.0 rev/min, what is the magnitude of the average torque required to tilt its axis by 60.0° in a time of 3.00 s? [Hint: Draw a vector diagram of the initial and final ang...

Q: A Vulcan spaceship has a mass of 65 000 kg and a

A Vulcan spaceship has a mass of 65 000 kg and a Romulan spaceship is twice as massive. Both have engines that generate the same total force of 9.5 × 106 N. (a) If each spaceship fires its engine for...

Q: A door weighing 300.0 N measures 2.00 m

A door weighing 300.0 N measures 2.00 m × 3.00 m and is of uniform density; that is, the mass is uniformly distributed throughout the volume. A doorknob is attached to the door as shown. Where is the...

Q: At the surface of a freshwater lake the air pressure is 1

At the surface of a freshwater lake the air pressure is 1.0 atm. At what depth under water in the lake is the water pressure 4.0 atm?

Q: How should the disk be oriented to prevent rocking from side to

How should the disk be oriented to prevent rocking from side to side and from bow to stern? Does this orientation make it difficult to steer the ship? Explain.

Q: A boy of mass 60 kg is sledding down a 70 m

A boy of mass 60 kg is sledding down a 70 m slope starting from rest. The slope is angled at 15° below the horizontal. After going 20 m along the slope, he passes his friend, who hops onto the sled. T...

Q: An aluminum cylinder weighs 1.03 N. When this same

An aluminum cylinder weighs 1.03 N. When this same cylinder is completely submerged in alcohol, the volume of the displaced alcohol is 3.90 × 10−5 m3. If the cylinder is suspended from a scale while s...

Q: A streetcar named Desire travels between two stations 0.60 km

A streetcar named Desire travels between two stations 0.60 km apart. Leaving the first station, it accelerates for 10.0 s at 1.0 m/s2 and then travels at a constant speed until it is near the second s...

Q: Two pendulum bobs have equal masses and lengths (5.1

Two pendulum bobs have equal masses and lengths (5.1 m). Bob A is initially held horizontally while bob B hangs vertically at rest. Bob A is released and collides elastically with bob B. How fast is b...