Questions from College Physics

Q: You are given the task of designing a mechanism to trip a

You are given the task of designing a mechanism to trip a switch in an automobile seat belt, causing it to tighten in case of an accident. You decide that if the velocity of the car is high and consta...

Q: What is the potential energy if a third point charge q =

What is the potential energy if a third point charge q = −4.2 nC is placed at point a?

Q: While you are supervising playground activity during recess, the children are

While you are supervising playground activity during recess, the children are playing a game of tag. As Marlene and Shelly run past each other in opposite directions, Marlene reaches out and touches t...

Q: Give a real example of the motion of some object for which

Give a real example of the motion of some object for which: (a) the velocity and net force are in the same direction; (b) the velocity and net force are in opposite directions; (c) the velocity is...

Q: A spacecraft is in orbit around Jupiter. The radius of the

A spacecraft is in orbit around Jupiter. The radius of the orbit is 3.0 times the radius of Jupiter (which is RJ = 71 500 km). The gravitational field at the surface of Jupiter is 23 N/kg. What is the...

Q: Why is the muzzle of a rifle not aimed directly at the

Why is the muzzle of a rifle not aimed directly at the center of the target? Why is this more important at longer ranges?

Q: A flat-bottomed barge, loaded with coal, has a

A flat-bottomed barge, loaded with coal, has a mass of 3.0 × 105 kg. The barge is 20.0 m long and 10.0 m wide. It floats in freshwater. What is the depth of the barge below the waterline?

Q: A proton in Fermilab's Tevatron is accelerated through a potential difference of

A proton in Fermilab's Tevatron is accelerated through a potential difference of 2.5 MV during each revolution around the ring of radius 1.0 km. In order to reach an energy of 1 TeV, how many revoluti...

Q: Each prong of a vibrating tuning fork moves back and forth quite

Each prong of a vibrating tuning fork moves back and forth quite precisely in simple harmonic motion. The distance the prong moves between its extreme positions is 2.24 mm. If the frequency of the tun...

Q: You are on the Moon and would like to send a probe

You are on the Moon and would like to send a probe into space so that it does not fall back to the surface of the Moon. What launch speed do you need?