Question

A bullet of mass $100g$ was shot with a velocity of $1000km/hr$ towards the target. What would be its kinetic energy?

Choose the closest valued option.

• A. 3864 J
• B. 4240 J
• C. 2586 J
• D. 6580 J

Answer 1

The correct option is A

3864 J

The mass of the bullet is $100g$ and the velocity of the bullet is $1000km/hr$.

$K.E.=\frac{1}{2}m{v}^2$,
where $m$ is the mass of the bullet and $v$ is the velocity of the bullet.

$1000\frac{km}{hr}$ = $278\frac{m}{sec}$ (approximately)

Substituting $m$ as $0.1kg$ and
$v$ as $278\frac{m}{sec}$ in the formula, we would obtain kinetic energy to be $3864J$