Question

The position of a particle is given by
p = 3tî – 2t j +4ỉ m where t is in
second and the co-efficients have proper
units for r to be in m. The magnitude and
direction of velocity of the particle at t = 2
sis
8.54ms-1, 20° with X- axis
10.54ms-1, 70° with x - axis
8.54ms-170° with x - axis
10.54ms-1, 70° with x - axis​

Answer 1

1.A vector quantity is specified by its magnitude as well as the direction associated with it. ... = 30 + (-10) = 20m/s ... Centripetal acceleration, ac = ω2r = (250)2 x 1000 ... (73) = 8.54ms-1.

2.