Rohangrr
SIMPLE QUESTIONS FOR YOU ALL
A bus was moving at a speed of 54 km/h. on applying brakes, it stopped in 8 seconds. calculate the speed acquired and distance traveled in this time.
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baddinlol
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The speed acquired is 0m/s
apoorvk
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1
Speed acquired?????
baddinlol
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Because the bus stopped
apoorvk
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That be zero, since it stops!
Rohangrr
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5
plzzz do show u r solutions
baddinlol
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3
distance use, x = v=0.5(u+v)t
Rohangrr
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give answer in one comment please its my request
baddinlol
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So x = 0.5* 15 * 8 = 60m
apoorvk
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Well, you have initial velocity = u = 54 kmph = 54 x (5/18) m/sec = 15 m/sec
Final velocity = v = 0
Time = 8 seconds.
Use Newton Unkle's equation # 1 ---> \( a = \frac{v-u}{t}\), and fond out the deceleration 'a'.
Then, use \(v^2 - u^2 = 2as\) to find out the distance covered, i.e. 's'.
apoorvk
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(Note of precaution: Newton's equations are only valid for uniform-linear motion, as you may know.)
King
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sry...
use \[x=\frac{v+u}{2} \times t\]
Rohangrr
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thanks aproov it proved my solution was wrong
King
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where v is final speed=0
u is initial speed=15
and t=8
apoorvk
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Yeah, using the average velocity funda is good actually, @King
Rohangrr
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oKAY thanks king to u as well
apoorvk
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In fact innovative. :]
King
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yw...thnx @apoorvk
Rohangrr
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lol