A 400 N crate rests on a horizontal floor. How much work is required to move it at a constant speed a) if the crate moved 3 m horizontally (against the floor) against a friction force of 150 N?
b) if the crate is lifted 3 m (vertically)?

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Match these items. 1. coulombs __force 2. ohms __emf 3. centimeters __resistance 4. newtons __charge 5. volts __length

Alarge cruise ship of mass 7.00 ✕ 107 kg has a speed of 11.6 m/s at some instant. (a) what is the ship's kinetic energy at this time? (b) how much work is required to stop it? (give the work done on the ship. include the sign of the value in your answer.) (c) what is the magnitude of the constant force required to stop it as it undergoes a displacement of 3.00 km?