- When t＜0, the distance covered by the particle is zero.
Therefore, the force on the particle is zero.
- When 0＜ t ＜4s, the particle is moving with a constant velocity.
Therefore, the force will be zero.
- When t＞4s, the particle remains at a constant distance.
Therefore, the force of the particle will be zero.
Impulse at t = 0.
Here, u = 0
v = ¾ = 0.75 m/s
M = 4 kg
Impulse= total change in momentum = mv – mu = m (v – u)
= 4 (0 – 0.75) = -3 kg m/s
Impulse at t= 4s
u = 0.75 m/s, v = 0
Impulse = m (v – u) = 4 (0 – 0.75) = -3 kg m/s
Articles to explore
1. What is momentum? Write its SI unit. Interpret force in terms of momentum. Represent the following graphically (a) momentum versus velocity when mass is fixed. (b) momentum versus mass when velocity is constant.