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The kinetic energy K of an object of mass m moving at a speed v is defined as K=(1/2)mv

Let us now consider the situation quantitatively. Let the mass of the sled be m and the magnitude of the net force acting on the sled be F

Consider an interval of time during which the sled covers a distance s and the speed of the sled increases from v

1.Find the net force F

(Express your answer in terms of some or all of the variables m, s, v

2.Find the net work W

(Express your answer in terms of some or all of the variables F

^{2}. It seems reasonable to say that the speed of an object--and, therefore, its kinetic energy--can be changed by performing work on the object. In this problem, we will explore the mathematical relationship between the work done on an object and the change in the kinetic energy of that object.Let us now consider the situation quantitatively. Let the mass of the sled be m and the magnitude of the net force acting on the sled be F

_{net}. The sled starts from rest.Consider an interval of time during which the sled covers a distance s and the speed of the sled increases from v

_{1 }to v_{2}. We will use this information to find the relationship between the work done by the net force (otherwise known as the net work) and the change in the kinetic energy of the sled.1.Find the net force F

_{net}acting on the sled.?(Express your answer in terms of some or all of the variables m, s, v

_{1}, and v_{2})2.Find the net work W

_{net}done on the sled.?(Express your answer in terms of some or all of the variables F

_{net}and s.)
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