2000 kg car with speed 12.0 m/s hits a tree. The tree does not move or break and the front of the car is smashed inward 50.0 cm. Ignore friction. (a) Determine the work done on the car by the tree. (b) Determine the amount of force involved

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11. A person pushes a m = 2.60 kg carton a distance d = 4.20 m along the floor by a constant force of magnitude F = 16.0 N directed at an angle 0 = 30.0° below the horizontal as shown in the figure. Assume the floor is frictionless. (a) Determine the work done on the carton by the applied force (the force on the carton exerted by the person). (b) Determine the work done on the carton by the normal force exerted by the floor. (c)Determine the work done on the carton by the gravitational force. (d)Determine the work done by the net force on the carton. m

1. Jogger A has a mass m and a speed v, jogger B has a mass m/2 and a speed 3v, jogger C has a mass 3m and a speed v/2, and jogger D has a mass 4m and a speed v/2. Rank the joggers in order of increasing kinetic energy. Indicates ties where appropriate. Explain and draws.