Two particles are at rest as shown. Suddenly a force F =6 N starts acting on the 3 kg particle. Find the velocity of the centre of mass of these particles at t =5 sec

Question

Two particles are at rest as shown. Suddenly a force F =6 N starts acting on the 3 kg particle. Find the velocity of the centre of mass of these particles at t =5 sec (A) 6 m/s (B) 5 m/s (C) 4 m/s (D) 10 m/s

Tardigrade Admin · Accepted Answer

a=(6/3)=2 m / s 2

=0+2 × 5 =10 m / s V cm =(2 × 0+3 × 10/2+3) ⇒ 6 m / s

Q. Two particles are at rest as shown. Suddenly a force $F = 6 N$ starts acting on the $3 k g$ particle. Find the velocity of the centre of mass of these particles at $t = 5 sec$

6 m/s

5 m/s

4 m/s

10 m/s

$a = \frac{6}{3} = 2 m / s^{2}$

$= 0 + 2 \times 5$
$= 10 m / s$
$V_{c m} = \frac{2 \times 0 + 3 \times 10}{2 + 3}$
$\Rightarrow 6 m / s$

Q. Two particles are at rest as shown. Suddenly a force F=6N starts acting on the 3kg particle. Find the velocity of the centre of mass of these particles at t=5sec