Question

What is the K.E. of 2000 Kg car travelling at 90 Km/h. and how to change km/ h into km/sec
how to solve it ? ​

Answer 1

Answer:

1.5 kelometer per second hour

Answer 2

The kinetic energy is

K

E

=

1

2

m

v

2

The mass is

m

=

2000

k

g

The velocity is

v

=

20

m

s

−

1

So,

K

E

=

1

2

⋅

2000

⋅

20

2

=

400000

J

=

400

k

J

to convert km/h to km/sec divide the speed by 3600