The position of an object moving along x-axis is given by x a bt = + w

1.	The position of an object moving along x-axis is given by x a bt = + where a m = 8.5 ,1b ms 2.5 −= and t is measured in seconds. What is its velocity att = 0 s and t s = 2.0 .
Answer» Answer: 15 m/s Explanation: 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 −x 1 =48.5−18.5=30 m Time TAKEN t=4−2=2 s Average VELOCITY V avg = t S = 2 30 =15 m/s

The position of an object moving along x-axis is given by x a bt = + where a m = 8.5 ,1b ms 2.5 −= and t is measured in seconds. What is its velocity att = 0 s and t s = 2.0 .

Answer»

Answer:

15 m/s

Explanation:

Position is given as x=a+bt

=8.5+2.5t

Position at t=2 s, x

=8.5+2.5(2)

=18.5 m

Position at t=4 s, x

=8.5+2.5(4)

=48.5 m

Displacement S=x

−x

=48.5−18.5=30 m

Time TAKEN t=4−2=2 s

Average VELOCITY V

avg

=15 m/s

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The position of an object moving along x-axis is given by x a bt = + where a m = 8.5 ,1b ms 2.5 −= and t is measured in seconds. What is its velocity att = 0 s and t s = 2.0 .

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