A force is applied to a 2.0-kg radio-controlled model car parallel to the x-axis

Question

A force is applied to a 2.0-kg radio-controlled model car parallel to the x-axis as it moves along a straight track. The x-component of the force varies with the x-coordinate of the car as shown in figure .Suppose the model car is initially at rest at x =0 and F(vector) is the net force acting on it.

the graph in the link.
http://session.masteringphysics.com/problemAsset/1260139/2/YF-06-32.jpg

Part A
Use the work-energy theorem to find the speed of the car at x=3.0m.

Part B
Use the work-energy theorem to find the speed of the car at x=4.0m.

Part C
Use the work-energy theorem to find the speed of the car at x=7.0m.

Explanation / Answer

A) 2 m/s
b) 2 m/s
c) 1.7 m/s

The area under the curve from x1 to x2 is .... It represents Work.
work=k
...... = 0.5 * m * v^2

∴

v=

good luck

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