Newton's first law of motion states that an object will keep a constant velocity unless acted upon by an unbalanced force.

To test this statement, Martin rolled a ball on a long, level street. The ball did not bump into any object, but it eventually came to a stop. How is this possible?
A. The unbalanced force that caused the ball to stop was friction.
B. Newton's first law of motion only holds true in space, not on Earth.
C. Martin did not roll the ball hard enough, which caused the ball to eventually stop rolling.D. Every moving object must come to a stop because energy cannot

Question

Newton's first law of motion states that an object will keep a constant velocity unless acted upon by an unbalanced force. 

To test this statement, Martin rolled a ball on a long, level street. The ball did not bump into any object, but it eventually came to a stop. How is this possible?
A. 	 The unbalanced force that caused the ball to stop was friction.
B. 	 Newton's first law of motion only holds true in space, not on Earth.
C. 	 Martin did not roll the ball hard enough, which caused the ball to eventually stop rolling.D. 	 Every moving object must come to a stop because energy cannot

anonymous · Answer

A. i had the same question when i was in the 8th grade;D