Question

4. W=FX
a)m.
b) cm.
c)j.
d) s​

Answer 1

Answer:

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Answer 2

Answer:

W

s

=

2

1

k(x

i

2

−x

f

2

). Since F

x

=−kx, the slope in corresponds to the spring constant k. Its value is given by k = 80 N/cm = 8.0×10

3

N/m.

Explanation:

When the block moves from x

i

=+8.0cm to x = + 5.0cm, we have

W

s

=

2

1

(8.0×10

3

N/m)[(0.080m)

2

−(0.050m)

2

]=15.6J=16J.