1. When a net force of 145 N is applied to a certain object, it accelerates at a rate of 3.5 m/s2. Find the mass of the object in kg.
2. A person weighs 190 lb. Find the mass in kg.
3. The mass of a person is 75 kg. Find the wight (a) on the Earth, (b) on the moon The wight must be given in pounds.
4. The weight of a person on the earth is 145 lb. Find her weight on Mars (gmars=3.8 m/s2).
5. A lamp hangs in equilibrium from the ceiling. The mass of the lamp is 14kg. What force must be applied (magnitude and direction) to keep the lamp in equilibrium?
6. A 50 kg box is on the floor where the sliding friction force is 0 N. If we apply a force of 100 N, what will be the box acceleration in m/s2?