Question

How much kinetic energy has 5 gram bullet speeding at 100 m/s

Answer 1

Answer: 25J

Explanation:

K.E =
`(1)/(2)`m
`v^(2)`

Where ;

m = mass in kg

v = speed

Given:

m = 5g = 0.005kg ( we divided by 1000 to convert g to kg)

v = 100 m/s

Therefore :

K.E =
`(1)/(2)` x 0.005 x
`100^(2)`

K.E = 25 Joules