A 1000 kg cars on constant speed of 25 m/s . What is the magnitude of average netforce, is required to slowing car to 12.5 m/s within 15 seconds?

What is the mass of the water that is being heated? it requires 2,500 joules to raise a certain amount of water (c = 4.186 jig c) from 20.0°c to 60.0°c. o 159 o 40 g o 63 g o 80 g