Test ll. Problem Solving
1. A 20 kg boy is riding a 6 kg bicycle with a velocity of 4 m/s to the north. what is the total momemtum of the boy and the bike together?
2. A 0.25 kg arrow with a velocity of 15m/s to the east strikes and pierces tha bull's eye of a 7.0 kg target. what is the final velocity of the combined mass?
3. An object has a mass of 5 kg. calculate its potential energy 3 m above the ground
4. Calculate the kinetic energy of a 1000 kg car travelling at 60 km/h​