An electron of mass $9.11×10^{-31}\, kg$ is moving with velocity $5.4×10^6\, m/s$. Its momentum will be
Answer & explanation
Correct answer: option 1
The correct answer is Option (1) → $4.92 × 10^{-24}\, kg\, m/s$
Given:
Mass of electron, $m = 9.11 \times 10^{-31} \ \text{kg}$
Velocity, $v = 5.4 \times 10^6 \ \text{m/s}$
Momentum: $p = m v$
$p = (9.11 \times 10^{-31}) \cdot (5.4 \times 10^6) = 4.9194 \times 10^{-24} \ \text{kg·m/s}$
Momentum, $p \approx 4.92 \times 10^{-24} \ \text{kg·m/s}$