Aboat with a horizontal tow rope pulls a water skier. she skis off to the side so that the rope makes an angle of 10 degrees with the forward direction of motion. if the tension in the room is 200 n, how much work does the rope do on the skier during a forward displacement of 100 m?

An astronaut in space cannot use a scale or balance to weigh objects because there is no gravity. but she does have devices to measure distance and time accurately. she knows her own mass is 77.4 kg , but she is unsure of the mass of a large gas canister in the airless rocket. when this canister is approaching her at 3.50 m/s , she pushes against it, which slows it down to 1.30 m/s (but does not reverse it) and gives her a speed of 2.60 m/s . what is the mass of the canister?