A760 n man stands in the middle of a frozen pond of radius 6.0 m. he is unable to get to the other side because of a lack of friction between his shoes and the ice. to overcome this difficulty, he throws his 1.2 kg physics textbook horizontally toward the north shore, at a speed of 6.0 m/s. how long does it take him to reach the south shore?

As you are trying to move a heavy box of mass m, you realize that it is too heavy for you to lift by yourself. there is no one around to , so you attach an ideal pulley to the box and a massless rope to the ceiling, which you wrap around the pulley. you pull up on the rope to lift the box. use g for the magnitude of the acceleration due to gravity and neglect friction forces. once you have pulled hard enough to start the box moving upward, what is the magnitude f of the upward force you must apply to the rope to start raising the box with constant velocity? express the magnitude of the force in terms of m, the mass of the box.

Explain why electric current cannot exist if a current doesn't have a voltage source.

Select the three ways that the parallel-plate capacitor differs from a car battery.