Questions from College Physics

Q: A student's head is bent over her physics book. The head

A student's head is bent over her physics book. The head weighs 50.0 N and is supported by the muscle force Fm exerted by the neck extensor muscles and by the contact force Fc exerted at the atlantooc...

Q: (a) If a spacecraft moves in a straight line between

(a) If a spacecraft moves in a straight line between Earth and the Sun, at what point would the force of gravity on the spacecraft due to the Sun be as large as that due to Earth? (b) If the spacecra...

Q: A boy has stacked two blocks on the floor so that a

A boy has stacked two blocks on the floor so that a 5.00 kg block is on top of a 2.00 kg block. (a) If the coefficient of static friction between the two blocks is 0.400 and the coefficient of static...

Q: You want to lift a heavy box with a mass of 98

You want to lift a heavy box with a mass of 98.0 kg using the two ideal- pulley system as shown. With what minimum force do you have to pull down on the rope in order to lift the box at a constant vel...

Q: If a wagon starts at rest and pulls back on you with

If a wagon starts at rest and pulls back on you with a force equal to the force you pull on it, as required by Newton's third law, how is it possible for you to make the wagon start to move? Explain....

Q: Can the x-component of a vector ever be greater than

Can the x-component of a vector ever be greater than the magnitude of the vector? Explain.

Q: A heavy ball hangs from a string attached to a sturdy wooden

A heavy ball hangs from a string attached to a sturdy wooden frame. A second string is attached to a hook on the bottom of the lead ball. You pull slowly and steadily on the lower string. Which string...

Q: An SUV collides with a Mini Cooper convertible. Is the force

An SUV collides with a Mini Cooper convertible. Is the force exerted on the Mini by the SUV greater than, equal to, or less than the force exerted on the SUV by the Mini? Explain.

Q: You want to push a 65 kg box up a 25°

You want to push a 65 kg box up a 25° ramp. The coefficient of kinetic friction between the ramp and the box is 0.30. With what magnitude force parallel to the ramp should you push on the box so that...

Q: You are standing on one end of a light wooden raft that

You are standing on one end of a light wooden raft that has floated 3 m away from the pier. If the raft is 6 m long by 2.5 m wide and you are standing on the raft end nearest to the pier, can you prop...