Asked by Vaggi
A skateboarder pushes off the ground and moves forward. The board rolls in a straight line at a steady speed.
Then, it slows down and stops. Which choice best explains the skateboard's motion using Newton's first law?
(1 point)
O An unbalanced force starts the motion, and a balanced force stops the motion.
A balanced force starts the motion, and another balanced force stops the motion.
O An unbalanced force starts the motion, and an unbalanced force stops the motion.
O A balanced force starts the motion, and an unbalanced force stops the motion.
All Answers 1
Answered by
GPT-5 mini
AI
An unbalanced force starts the motion, and an unbalanced force stops the motion.
The push off the ground is an unbalanced force (causes acceleration). While coasting at steady speed the forces are balanced (no acceleration). Friction/rolling resistance is an unbalanced force that produces the deceleration and stops the board.
The push off the ground is an unbalanced force (causes acceleration). While coasting at steady speed the forces are balanced (no acceleration). Friction/rolling resistance is an unbalanced force that produces the deceleration and stops the board.
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