Two objects of the same mass move along the same line in opposite directions. the first mass is moving with speed . the objects collide, stick together, and move with speed 0.100 in the direction of the velocity of the first mass before the collision. what was the speed of the second mass before the collision?
a. 0.00
b. 0.800
c. 0.900
d. 10.0
e. 1.20

In raising a 6200-n piano with a pulley system, the movers note that, for every 2.2 m of rope pulled down, the piano rises 0.12 m . ideally, find the force required to lift the piano.

In the sport of parasailing, a person is attached to a rope being pulled by a boat while hanging from a parachute-like sail. a rider is towed at a constant speed by a rope that is at an angle of 15 ∘ from horizontal. the tension in the rope is 1900 n. the force of the sail on the rider is 30∘ from horizontal. what is the weight of the rider? express your answer with the appropriate units.

What must be the same for any two resistors that are connected in series ? a. the potntial diffrence across each b. the rate at which charge moves through each c. the rate at which energy is used by each d. the resistance to the flow of charge of each