Full Solution - Remember to show all work, formulas, units and significant digits in your answers!

1. A snowmobile pulls a 10 kg sled across the snow with an acceleration of 3.0 m/s^2 for a distance of 25 m, if the coefficient of friction between the snowmobile, sled and snow is 0.82:

a)calculate the work done by friction (3 marks}

b)calculate the amount of work that the snowmobile does on the sled (3 marks)

c) calculate the total work done on the sled. (2 marks)

1. A physics student is riding a snowmobile that has a mass of 200 kg. His kinetic energy is 40,000 J. Calculate the speed that student is driving (convert it to km/h). (4 marks)

1. A cat with a mass of 11 kg is sitting in a tree. The gravitational potential energy of the cat is 1040 J. Calculate how high the cat is in the tree. (3 marks)

1. A roller coaster cart full of people starts from rest at a position 90.0 m above the ground. Calculate the speed of the roller coaster at B. (5 marks)

A

1. Calculate the amount work is done by the engine of a 9000.0 kg truck if it accelerates from 5.0 m/s to 18.0 m/s over a distance of 350.0 m? (4 marks)