Laws of Motion - Result Question 1
1. A particle moving with velocity $P$ is acted by three forces shown by the vector triangle $PQR$. The velocity of the particle will :
(a) increase
[2019]
(b) decrease
(c) remain constant
(d) change according to the smallest force
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Solution:
- (c) As three forces are forming closed loop in same order, so net force is zero.
i.e., $\overrightarrow{{}F} _{\text{net }}=0$
or $m \frac{d \overrightarrow{{}v}}{dt}=0$
$\therefore$ Velocity of the particle
$\vec{v}=$ Constant
