Wonder Woman is skateboarding at -10 m/s in 1ºC air at time 8 o'clock. The combined mass of Wonder Woman and the skateboard is 100 kg. Ester tosses a pumpkin of mass 10 kg to Wonder Woman, and when she catches it, she and the skateboard begin to roll with a speed of 15 m/s. What was the speed of the pumpkin?

1) what is the power in horsepower of a 100 watt light bulb? what is the power in kilowatts of a 200 horsepower engine? 2) if a cars engine is providing 3000 n of force to keep the car moving at 5 m/s, what is the engine’s effective power? 3) how many gallons of water will be pumped from a well 30 feet deep by a 1/2 hp engine in 1 minute? (1 gallon weighs 8.34 pounds)