4. A 20.0 kg cannonball is fired from a cannon at a speed of 1000 m/s at an angle of 31.0° with the horizontal. A second bullet of the same mass is fired from the same barrel at an angle of 90.0º. Use conservation of mechanical energy to find a) the maximum height reached (For each bullet) b) the total mechanical energy at the maximum height. (For each bullet)

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Instantaneous Power

Power is defined in physics as the amount of energy transmitted or transformed per unit time. The watt is the unit of electricity in the International System of Units, equivalent to one joule per second.