Question

A car of mass 1000 kg moving with a speed 18 km/hr. on a horizontal surface,the coefficient of friction is 0.5 and the car colliding with a horizontal mounted spring.the spring constant is 6.25×10^3 Nm^-1.

Answer 1

Answer:

Here,

m=1000 kg,v=18 km h

−1

=18×

18

5

ms

−1

=5 ms

−1

k=6.25×10

3

N m

−1

At maximum compression x

m

, the kinetic energy of the car is converted entirely into the potential energy of the spring.

∴

2

1

mv

2

=

2

1

kx

m

2

or x

m

=

k

m

v

Substituting the given values, we get

x

m

=

6.25×10

2

N m

−1

1000 kg

×5 ms

−1

=0.4×5 m=2 m.

Explanation:

Mark as the brainliest answer