Physics

D Question 13 2 pts A bricklayer lifts bricks to the top course of a long wall she is building 1.34 m above her wheelbarrow. Assuming she can generate 143 W of useful power, how long will it take (not counting breaks and reloading time) to lift up 1,839 kg of bricks? Please take the acceleration due to gravity to be g = 9.80 m.s"2 and give your answer in seconds. D Question 14 2 pts An airport baggage handler pulls a baggage trolley 18.1 m along the flat tarmac. He pulls in a direction 27.20 above the horizontal. The trolley wheels exert a resisting frictional force averaging 32.5 N. Find the magnitude of the force the baggage handler must supply to pull the trolley at a constant speed. D Question 15 2 pts A 92.4 g toy car travels up a ramp to a step 0.189 m above its starting point. If its initial speed is 2.09 ms" and its final speed is 0.21 ms"], how much work was done against friction? Please take the gravitational acceleration to be g = 9.80 m.s"2 and enter your answer in Joules