Question

An object has a kinetic energy of 14 j and a mass of 17 kg how fast is the object moving

Answer 1

• KE=14J
• Mass=m=17kg
• Velocity=v=?

$\\ \sf\Rrightarrow kE=\dfrac{1}{2}mv^2$

$\\ \sf\Rrightarrow 14=\dfrac{1}{2}17v^2$

$\\ \sf\Rrightarrow 17v^2=28$

$\\ \sf\Rrightarrow v^2=28/17$

$\\ \sf\Rrightarrow v^2=1.64$

$\\ \sf\Rrightarrow v\approx 0.13m/s$