Question

A block of mass M =1kg is dropped from a height h = 40cm on a horizontal platform fixed to one end of an elastic spring the other being fixed to a base as shown in fig. As a result the spring is compressed by an amount x = 10cm. The force constant of the spring is (g=10m/s)

Answer 1

Answer:

−1

Kx

2

=0−

2

1

mv

2

K.

100

1

=1.2.10.

10

4

K=800N/m

Hence,

optionBiscorrectanswer.

Answer 2

Explanation:

force=mg=1×10=10N.

Therefore force=10N