A bowling ball has a mass of 7.2 kg and a weight of 70.6 N. It moves down the bowling alley at 1 m/s and strikes a pin with a fo
2 answers:
Answer:
<h2>15N</h2>Explanation:
The choices for this question are
- 7.2 N
- 15.0 N
- 70.6 N
- 85.6 N
Givens
However, to solve this we just need to use Newton's third law which states: <em>"When an object exerts a force on another object, the second object will exert an equal and opposite force to the first object".</em>
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If the bowling ball strikes a pin with a force of 15N, then the pin will exert the same 15N on the bowling ball, but with the opposite direction. If the bowling force is positive, then the pin force will be negative.
Therefore, the right answer is the second choice 15N.
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Answer:
2.31J
Explanation:
the energy for a spring system is given by:
where is the spring constant:
and
is the distance stretched from the equilibrium position.
In the first case
so the energy to stretch the spring 1.81cm is:
and for the second case, the energy to stretch the spring 5.79cm:
so to answer a) we must find the difference between these energies: