Concept explainers
A ball rolling along a bowling alley moves at constant speed
(a) without the need of horizontal force.
(b) due to a slight force in its direction of motion.
(c) due to slight friction that slows it.
(d) due to gravity.
The correct option for the statement "A ball rolling along a bowling alley moves at constant speed".
Answer to Problem 5RAT
The correct option for the statement "A ball rolling along a bowling alley moves at constant speed" is option (a).
Explanation of Solution
Galileo discredited the idea of Aristotle for the force required to keep objects moving. Galileo states that a force is required only to start the motion of an object, but after the movement, no force is required to maintain a body's motion except for the external force needed to overcome friction.
In a given condition, a ball rolling along with a bowling alley moves at constant speed means it does not suffer from any friction offered by the bowling alley. It also means that only an initial force is given to the ball for its motion. From this, it is concluded that option (a) will be correct in the given options.
Conclusion:
Therefore, the correct option for the statement "A ball rolling along a bowling alley moves at constant speed" is option (a).
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