Question

A car of mass 150kg is moving with a speed ofn15m/s and another indentical car moving with a speed of 30m/s. Find their Kinetic Energy.​

Answer 1

Answer:

Two identical cars means , they have equal mass

K.E.=

2

1

mv

2

Let m be the mass of each car

Kinetic energy of car A =

2

1

m×(15)

2

=

2

225

m

Kinetic energy of car B =

2

1

m×(30)

2

=450m

K.E.ofB

K.E.ofA

=

2×450m

225m

=

4

1

=1:4

K.E. of car B is 4 times K.E. of car A.