Chapter 4
Newton's Three Laws
Part 5

Solution 5

We need to find the acceleration of the plane first.

Given:

This leads to the kinematics equation to find the acceleration. Plugging in the given values and solving for a gives:

Now we need to use Newton's Second Law to find the force. The only direction we are worried about is the x direction. Therefore, all of the force in that direction needs to be added up and set equal to the mass and acceleration. The force will be negative because we are slowing the plane down.

Now it is your turn.
Find the plane's stopping distance if the magnitude of the force exerted by the Foamcrete is doubled.

61.0 m

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