Any help would be appreciated. Thank you so much! If the frictional forces exper

Question

Any help would be appreciated.

Thank you so much!

If the frictional forces experienced by the cart are negligible, explain why the net force on the cart at each moment is the same as the pulling force measured by the force sensor at each moment. Explain how the value of K at each location can be calculated from the mass, m, of the cart and from the velocity of the cart corresponding to a given value of x. What equation can be used to calculate the kinetic energy change ( (Delta K_{a->b}) ) as the cart moves from positions xa to xb? You can denote the corresponding horizontal velocity components va and vb. If friction is present and the cart is being pulled, there are four forces on the cart. List these forces. Any help would be appreciated.

Explanation / Answer

1) Since newton's third law, F from cart on sensor = F sensor on cart

2) K = 1/2 mv^2

3) dK = 1/2 m vb^2 - 1/2 m va^2

4)

Pulling force
Normal Force
gravity
friction

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