1. An electric motor is 75% efficient. It is used to raise a weight of 1000N a vertical distance of 5m in 10s. a. Given its efficiency, at what rate must power be supplied to the motor. Show solutions. b. What happens to the energy used to raise the weight?

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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.