Answer:
The correct answer is -
1. 67500 J
Step-by-step 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.