The position of a particle 𝑥 (in meter) at a time 𝑡 second is given by the relation 𝑟 = (3𝑡𝐢̂− 𝑡 2 𝐣̂+ 4𝐤̂ ). Calculate the magnitude of velocity of the particle after 5 s.

The position of a particle 𝑥 (in meter) at a time 𝑡 second is given by the relation 𝑟 = (3𝑡𝐢̂− 𝑡 2 𝐣̂+ 4𝐤̂ ). Calculate the magnitude of velocity of the particle after 5 s.

Question : The position of a particle 𝑥 (in meter) at a time 𝑡 second is given by the relation 𝑟 = (3𝑡𝐢̂− 𝑡 2 𝐣̂+ 4𝐤̂ ). Calculate the magnitude of velocity of the particle after 5 s.