Question
A body of mass $$m= 3.513 \,kg$$ is moving along the x-axis with a speed of $$5.00\,m{s^{ - 1}}.$$ The magnitude of its momentum is recorded as-
A.
$$17.6\,kg\,m{s^{ - 1}}$$
B.
$$17.565\,kg\,m{s^{ - 1}}$$
C.
$$17.56\,kg\,m{s^{ - 1}}$$
D.
$$17.57\,kg\,m{s^{ - 1}}$$
Answer :
$$17.6\,kg\,m{s^{ - 1}}$$
Solution :
Momentum, $$p = m × v$$
= (3.513) × (5.00)
= 17.565 $$kg\,m/s$$
= 17.6 (Rounded off to get three significant figures)