otcr. Choose the one alternative thai bes completes the statement re quantities

Question

otcr. Choose the one alternative thai bes completes the statement re quantities are SI units. What is the speed of the objeci at time in 9.43 D) 13.0 C) 765 B) 6.40 m/s m/s m/s object has by 12.0 m t (3.00 m srli t 13.0 m ere all a position given the magnitude of the uccelerati quantities are in SI t nits. What is ect at time t 2.00 s? 2.00 m/s2. 1.00 m/s2 4.00 m/s2 0.522 m/s2 o oo m/s? electron moves with a constant horizontal veiocity of 3.0 x 100 m/s and no pia, tar inside a f tube. The electron strikes th

Explanation / Answer

step;1

Given that

position r=(2+3t)i+(3-2t)j

time t=2 sec

step;2

now we find the position

position r=(2+3*2)i+(3-2*2) j=8i-j

=[8^2+1^2]^1/2=8 m

step;3

now we find the acceleration

acceleration a=2s/t^2=2*8/2^2=4 m/s^2

the correct option is C

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