) A position vector of a particle of 2kg mass at any time t is given by r =3ti+2t²j+t³k find at t =1 ...velocity and acceleration vectors,

b) the torque on the particle,

c) the kinetic energy,

d) Power,

e) Find the work done on the particle between t=0 and t=1

Explanation:

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v 154.9= 0.9 length length s little over 154.9cm

the motion of a pendulum is a classic example of mechanical energy conservation. a pendulum consists of a mass (known as a bob ) attached by a string to a pivot point. as the pendulum moves it sweeps out a circular arc, moving back and forth in a periodic fashion.