Answer: 1225 LA How much work has to be done against? (g = 9.8 m / s) 7. A ball is dropped from a height of 10 meters. If 30% of the energy of the ball after hitting the floor If she goes, how high will she go when she returns from the floor? Answer: 7.0 fat BThe point of a 100 grams of mass is thrown vertically upwards at a velocity of m / s. Paint Vij 18.2 km And another Force-free