CBSE Class 11-science Answered
dear sir/mam, plz answer the following question....
Asked by | 28 Feb, 2008, 12:42: AM
Expert Answer
Dear sir/mam, plz answer the following question.... |
a particle moves such that its position vector 'r' at time 't' is given by- ∧ ∧ r = i(3t2+2t)+ j(2t2+4t) determine the magnitude of (i)velocity at t=5sec (ii)acceleration. (where i and j are unit vectors along X and Y-axis) |
The velocity v = (d/dt ) . (i(3t2+2t)+ j(2t2+4t))
which on differentiating, we get,
v = (6t+2)i+(4t+4)j
substituting for t = 5 s
we get,
v=32i+24j m/s
Do similar thing to find acceleration given by a = (d/dt)v
Regards
Team
TopperLearningSystems
Answered by | 08 Dec, 2017, 03:03: PM
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