Question

An object has a mass of 1kg and kinetic energy of 100 Joule .If the velocity doubles, what would be it’s new kinetic energy ​

Answer 1

Answer:

400 Joules

Explanation:

$\frac{1}{2} mv^{2}=100\\\\\frac{1}{2}*1*v^{2}=100\\\\v^{2} =200\\\\v=\sqrt{200}=10\sqrt{2} \\\\New Velocity = 20\sqrt{2}\\\\v^{2}=800\\\\\frac{1}{2}*m*v_{2} ^{2}=\frac{1}{2}*1*800=400$