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A small motor has a power rating of 2.24 kW. It is used to lift a...

A small motor has a power rating of 2.24 kW. It is used to lift a crate. (a) The motor is able to lift the crate 1.5 m in 4 s. What is the mass of the crate? (b) This motor is then used to push a 200 kg box along the floor. If the box is travelling at 2 m/s, what would be the maximum acceleration from the motor at this velocity? (c) What would be the kinetic energy of the box at the velocity of 2 m/s? -2 A glass window is 1.5 mm thick and has a heat flux passing through it of 15 kW.m . The thermal conductivity of the glass is 0.7 W/m.K. (d) If the outside temperature is 12 °C, calculate the inside temperature. (e) If the window is rectangular with dimensions of 2 m x 3 m, how much heat is lost through the window in 5 hours?

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