For nearly 300 years, Isaac Newton’s first law of motion has been one of the most ... never free from external forces—whether ...

When the car crashes, there is no unbalanced force acting on the person, so they continue forward (Newton's First Law). The person ... the time taken for the motion of a car occupant's head ...

Car brakes apply an unbalanced force, causing deceleration (negative acceleration). This is due to Newton’s first law: object will ... in opposite direction to motion. The force of friction ...

Considered one of the greatest scientists who ever lived, Newton devoted his life to the study of the natural world, discovering the laws of gravity and motion ... He was the first scientist ...