Question

assess it! question #3: which is the best example of an unbalanced force? 1 point a. a book resting on a shelf. b. a train accelerating from the station. c. a chair sitting motionless. d. a car driving at a constant speed.

Explanation:

An unbalanced force causes an object to change its state of motion. A book resting, a chair sitting motionless, and a car driving at constant speed are in equilibrium with balanced forces. A train accelerating has a net - force acting on it, which is an example of an unbalanced force.

Answer:

B. A train accelerating from the station