Question

A particle is moving in x-y p1ane.At time t`=0,` particle is at `(1m, 2m)` and has velocity `(4 hat i + 6 hat j) m//s.` At `t = 4s,` particle reaches at `(6m, 4m)` and has velocity `(2 hat i + 10 hat j) m//s.` In the given time interval, find
(a) average velocity,
(b) average acceleration and
(c) from the given data, can you find average speed?

Answer 1

Correct Answer - A::B::C
(a) `v_(av)=s/t=(r_f-r_i)/t`
`=((6 hati+4 hatj)-(4 hati+6 hatJ))/4`
`=(1.25 hati+0.5 hatj)m//s`
(b) `a_(av)=(Deltav)/t=(v_f-v_i)/t`
`=((2 hati+10 hatj)-(4 hati+6 hatj))/4`
`=(-0.5 hati+hatj) m//s^2`
(c) We cannot calculate the distance travelled from
the given data.