A funny car accelerates from rest through a measured track distance in time 41 s with the engine operating at a constant power 220 kW. If the track crew can increase the engine power by a differential amount 1.0 W, what is the change in the time required for the run?

It's a snowy day and you're pulling a friend along a level road on a sled. you've both been taking physics, so she asks what you think the coefficient of friction between the sled and the snow is. you've been walking at a steady 1.5m/s, and the rope pulls up on the sled at a 32 ∘ angle. you estimate that the mass of the sled, with your friend on it, is 65 kg and that you're pulling with a force of 80 n .