A horizontal spring with spring constant 85 N/mN/m extends outward from a wall just above floor level. A 7.5 kgkg box sliding across a frictionless floor hits the end of the spring and compresses it 3.5 cmcm before the spring expands and shoots the box back out. How fast was the box going when it hit the spring

Why should seat belts not be mandatory quick plz

An alien spaceship is 500 m above the ground and moving at a constant velocity of 150 m/s upwards. how high above the ground is the ship after 5 seconds?

The electric potential v is constant everywhere within a certain region of space. which statement below is true? the choices are: the electric field is also constant (but not zero) within the region. a charged particle placed within the region will experience an electric force. the electric field is zero everywhere within the region. the electric field varies from place to place within the region.