Answer:
4.47
Explanation:
Kinetic energy
make use of the formula of kinetic energy
formula :
= [tex]\frac{1}{2}m v^{2}[/tex]
where m is the mass
v is the velocity
[tex]\frac{1}{2} *10 * v^{2} = 100[/tex]
[tex]5v^{2} = 100[/tex]
[tex]v^{2} = \frac{100}{5}[/tex]
[tex]v^{2} = 20\\[/tex]
[tex]v = \sqrt{20}[/tex]
v = 4.4721
to 3sf
v = 4.47
