THANK YOU in advance! Absent group members. l). A block is gently placed on a re

Question

THANK YOU in advance!

Absent group members. l). A block is gently placed on a relaxed vertical spring. When it comes to a rest again when the spring is fully compressed, yi the force of gravity has done 30 J of work on the block (i.e Wg= 30 J) la). Draw a FBD for the block as it compresses the spring. Initial stage Relaxed spring Final stage lb). What is total amount, WNen of work done on the block during its motion? Explain. lc). How much work, Ws, does the spring do on the block during the movement? Explain. ld). Ifthe spring constant of the spring k 6000 N/m, calculate yy the compression of the spring when the block is at rest at the end of its downward motion. le). Calculate the mass of the block.

Explanation / Answer

1b)

Since change in kinetic energy of block is zero

Net work done is zero

1c)

Wg+Ws =0

Ws =-Wg

Ws= -30J

1d)

30 = 0.5k y^2

yf=0.1m

1e)

Mgx0.1 =30

M=30.61kg

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