Question

two cubes of masses 3g and 6g and side of length 2cm and 3cm respectively are placed on a smooth table caluclate the pressure exerted on the ground​

Answer 1

Answer:

At the maximum extension, the velocity of both the blocks will be same.

Let the common velocity of the blocks is v.

From conservation of linear momentum, it can be written as,

(3+6)×v=6×2−3×1

v=1m/s

Let the maximum extension in the spring is x.

From conservation of mechanical energy, it can be written as,

2

1

×3×(1)

2

+

2

1

×6×(2)

2

=

2

1

×200×(x)

2

+

2

1

×9×(1)

2

x

2

=

100

18

=0.3m

=30cm

Thus, the maximum extension in the spring is 30cm.