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The Smith family is travelling in their car at 50 km/h due east. Mr. Smith is using cruise control to maintain a constant speed. Describe the net force acting on the Smith car.

Responses
A Net force equals zero.Net force equals zero.
B Net forces are unbalanced.Net forces are unbalanced.
C Net force is positive and to the east.Net force is positive and to the east.
D There is no way to determine net force.

2 answers

The correct response is:

A. Net force equals zero.

Since Mr. Smith is using cruise control to maintain a constant speed of 50 km/h due east, it means that the forces acting on the car are balanced. The car is moving at a constant velocity, so there is no net force acting on it.

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