Introduction to Work and Kinetic Energy

1 . A toy car can move along a straight line, defined as the x-direction.

The net force on the car, mass 5 kg, varies as the car moves, and is plotted as a function of position in the figure to the right. Assume that the car starts at x = 0 with a speed of 0. Find its speed when it reaches the 32 m mark. You can do this by combining the ideas of Newton with the ideas of kinematics.

 

 

 

 

 

 

 

 

2. Now consider the case where the force vs. position looks like the following graph.
What would you have to do to find the speed of the car at a time (assume you have numbers to work with)?