Question

position of an object moving varies as x=t³/3+t²+2 where x is in metre and t is in second. Speed of the object at t=2 sec is ​

Answer 1

Answer:

Position is given as x=a+bt

2=8.5+2.5t 2

Position at t=2 s, x 2

=8.5+2.5(2)

2

=18.5 m

Position at t=4 s, x 1

=8.5+2.5(4) 2

=48.5 m

Displacement S=x 2 −x1

=48.5−18.5=30 m

Time taken t=4−2=2 s

Average velocity V

aav = tS

= 230

=15 m/s

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Explanation:

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