Impulse with Variable Forces Video Lessons

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Problem: A 2.0 kg object is moving to the right with a speed of 1.0 m/s when it experiences the force shown in the figure. What are the object’s speed and direction after the force ends?

FREE Expert Solution

For an F-t graph, the area under the curve gives the change in momentum.

The change in momentum is referred to as impulse.

P=Fxtmvf-mv0=Fxt

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Problem Details

A 2.0 kg object is moving to the right with a speed of 1.0 m/s when it experiences the force shown in the figure. The figure is a graph of x-component of a force F x versus time t. F x is measured on the ordinate axis and t is measured on abscissa axis in seconds. F x is equal to zero at first, then after few moments decreases instantly to -2, remains constant for 1.0 second, and increases instantly back to 0, remaining constant after it.

What are the object’s speed and direction after the force ends?

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