Are the multiple choice answers of things and important?

Nishati ya kinetic (KE) inatolewa na formula:

$$KE = \frac{1}{2}mv^2$$

ambapo $m$ ni masi na $v$ ni kasi.

Masi ($m$) = 2 kg
Kasi ($v$) = 20 m/s

$$KE = \frac{1}{2} \times (2 \text{ kg}) \times (20 \text{ m/s})^2$$

$$KE = \frac{1}{2} \times 2 \text{ kg} \times (400 \text{ m}^2/\text{s}^2)$$ $$KE = 1 \text{ kg} \times 400 \text{ m}^2/\text{s}^2$$ $$KE = 400 \text{ J}$$

Nishati ya kinetic ni 400 J.

Thamani iliyokokotolewa inalingana na chaguo (a).

$$\boxed{\text{a) } 400}$$