Answer:
The correct answer is -
1. 67500 J
Explanation:
The formula for KE is
K. E. = 1/
2
*m
v
^2
So input the values we know:
K
. E. = 1/2
⋅*150 *30
^2
K
. E. = 150
*
900
/2
K
. E
. = 67500
K
. E. = 67500
If the velocity is double then;
use 2v in the formula
K. E. = (
1/
2
)*m(2
v)
^2
= (1/2)*4m
v
^2
it is four times to original Kinetic energy, and similarly if tripled then, it will be 9 times to original.
