Answer:
The answer is
3 m/s
Explanation:
The speed of an object given it's kinetic energy and mass can be found by using the formula
[tex]v = \sqrt{ \frac{2KE}{m} } [/tex]
where
KE is the kinetic energy
m is the mass
v is the speed
From the question
KE = 31,500 J
m = 7000 kg
The speed is
[tex]v = \sqrt{ \frac{2(31500)}{7000} } \\ = \sqrt{ \frac{63000}{7000} } \\ = \sqrt{ \frac{63}{7} } \\ = \sqrt{9} \: \: \: \\ = 3 \: \: \: \: \: \: \: [/tex]
We have the final answer as
3 m/s
Hope this helps you
