## Rohangrr Group Title 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. 2 years ago 2 years ago

The speed acquired is 0m/s

2. apoorvk Group Title

Speed acquired?????

Because the bus stopped

4. apoorvk Group Title

That be zero, since it stops!

5. Rohangrr Group Title

plzzz do show u r solutions

distance use, x = v=0.5(u+v)t

7. Rohangrr Group Title

So x = 0.5* 15 * 8 = 60m

9. apoorvk Group Title

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'.

10. apoorvk Group Title

(Note of precaution: Newton's equations are only valid for uniform-linear motion, as you may know.)

11. King Group Title

sry... use $x=\frac{v+u}{2} \times t$

12. Rohangrr Group Title

thanks aproov it proved my solution was wrong

13. King Group Title

where v is final speed=0 u is initial speed=15 and t=8

14. apoorvk Group Title

Yeah, using the average velocity funda is good actually, @King

15. Rohangrr Group Title

oKAY thanks king to u as well

16. apoorvk Group Title

In fact innovative. :]

17. King Group Title

yw...thnx @apoorvk

18. Rohangrr Group Title

lol