If an object with a mass of # 3kg # changes speed from #5m/s# to # 1m/s#, by how much does its kinetic energy change?
How much work does it take to raise a 3kg object 5m into the air? (a) What is the potential energy of the object when it is 5m in the air? (b) What does this tell you about the potential energy you get when you do work to lift an object? (c) If you drop the object, how fast is it going when it hits the ground? (d) What is the object’s kinetic energy when it hits the ground? (e)...
Point P is at a potential of 600.0 kV and point S is at a potential of 300.0 kV. The space between these points is evacuated. When a charge of +3e moves from P to S,by how much does its kinetic energy change? In J please.
a bullet of mass 5x10^-3kg is moving horizontally with a speed of 400m/s. what is the kinetic energy of the bullet? the bullet penetrates 5cm thick piece of wood,emerging with a speed of 200m/s. What is the work done on the bullet by the wood? what is the average force exerted on the bullet by the wood?
If an object's mechanical energy is equal to its potential energy, how much kinetic energy does it have? how do you know?