#### The same rocket sled drawn in Figure 4.30 is decelerated at a rate of 196 m/s². What force is necessary to produce this deceleration? Assume that the rockets are off. The mass of the system is 2100 kg.

## Solution:

From the problem, we know that the acceleration *a* is 196 m/s² and the mass *m *is 2100 kg. We are asked to solve for the net force F. Basically, we can compute for the net force using the Second Law of Motion by Newton.

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The net force opposing motion should be 411,600 Newtons to produce the given deceleration.