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1. If you compress a spring of spring constant 223 N/m by 1.29 cm, what is...

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Physics

1. If you compress a spring of spring constant 223 N/m by 1.29cm, what is the elastic potential energy of the spring?

2. You have a piano of mass 1,946 kg, which is suspended 14 mabove the ground. If we decide that the zero of our heightcoordinates is at the ground, what is the gravitational potentialenergy of the piano?

3. You have a kinetic friction force of 42.5 acting on a boxthat is moving across a rough table. If the box slows to a stop in19.6 cm, how much work is done by friction?

4. Find the scalar product of A⇀⋅B⇀

where A⇀=10.2iˆ+ 9.8jˆ and B⇀= 4.7iˆ+9.3jˆ

Answer & Explanation Solved by verified expert
3.7 Ratings (600 Votes)
1We have the spring is compressed by a distance ofAlso the spring constant of the springSowe have the potential energy stored in the springthe potential energy stored in the    See Answer
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