Question

.If (M - ) = -1/2 S, find the value of j.​

Answer 1

Answer:

Correct option is

B

a=3150,b=20,c=1190

The expression for kinetic energy is :

2

1

mv

2

Case (i):

Kinetic energy = x, M=28 kg, V=15 m/s.

KE=

2

1

mv

2

=

2

1

×28×15

2

=

2

6300

=3150J.

Case (ii):

Kinetic energy =2000 J, M=10 kg, V=x.

2

1

mv

2

=2000=

2

1

×10×x

2

.Thatis,x

2

=400.So,x=20m/s.

Case (iiI):

Kinetic energy =9520 J, M=x, V=4 m/s.

2

1

mv

2

=9520=

2

1

×x×4

2

.Thatis,x=

8

9520

=1190kg.

HOPE IT WILL HELP YOU