Question

1. 26000 J of energy is required to make a video. If Dr. Holmes is 1.90% efficient and there are 14840 J of energy in an M&M, how many M&M’s must Dr. Holmes eat to make a video?

2. A 25 kg cart is traveling up a 27° incline with an initial speed of 7.7 m/s. A fan comes on for a short period of time and adds 300 J of energy to the cart. While rolling, energy losses due to friction and air resistance are 380 J. Determine the distance up the incline the cart travels before coming to a stop.