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A bus starting from rest moves with a uniform acceleration of 0.1 m s−2 for 2 minutes. Find (a) the speed acquired, (b) the distance travelled.

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CBSE/Class 9/Science/Unit 3-Motion, Force and Work/Motion/NCERT Solutions/Intext Exercise 8.4

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B.tech in ECE as well as B.Ed & CTET qualified with 8+ years of experience in teaching of Physics

Given- u=0 (start from rest) a= 0.1 m/s2, t= 2 min= 2x60 sec =120 sec To find- a) v=? & b) s=? Solution- a) v = u +at= 0+ 0.1x 120 = 12m/s b) s= ut + 1/2 a (t) ² = 0 + 1/2 x0. 1x (120) ² = 720 m Concept- Always covert all quantities in to same unit ( prefer SI units) read more

Given- u=0 (start from rest) 

a= 0.1 m/s2, t= 2 min= 2x60 sec =120 sec

To find- a) v=? & b) s=? 

Solution- a) v = u +at= 0+ 0.1x 120 = 12m/s

b) s= ut + 1/2 a (t) ² = 0 + 1/2 x0. 1x (120) ² = 720 m

Concept- Always covert all quantities in to same unit ( prefer SI units) 

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Contact me at 6375 746627 for better conversation. Specialist for Civil Engineering and Upto 10th.

We shall use the equation Traveled distance = ut+(1/2)at^{2} U is the initial velocity, t is time a is acceleration Here, u=0, since bus started from rest. So, S = (1/2)at^2 = (1/2)×0.1×120^{2} Distance traveled after 2 mins = 720meters. read more

We shall use the equation

Traveled distance = ut+(1/2)at^{2} 

U is the initial velocity,

t is time

a is acceleration

Here, u=0, since bus started from rest.

So,

S = (1/2)at^2

= (1/2)×0.1×120^{2}

Distance traveled after 2 mins = 720meters.

 

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Speed ( v ) = 12 m/s, distance covered (s) = 1440 m
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Trained teacher, passionate about simplifying Chemistry

Given data Initial velocity, u = 0 m/s Acceleration , a= 0.1m/S2 Time, t = 2min= 120s Speed acquired, v= u +at = 0+ 0.1x120 = 12m/s. The speed acquired is 12m/s Distance travelled, S= ut + 1/2at2 = 0 + 1/2 ( 0.1x120x120) = 0.1x120x60 = 720m The distance travelled is 720m. read more

Given data

Initial velocity, u = 0 m/s

Acceleration , a= 0.1m/S2

Time, t = 2min= 120s

Speed acquired,

v= u +at

= 0+ 0.1x120

= 12m/s.

The speed acquired is 12m/s

Distance travelled, 

S= ut + 1/2at2

= 0 + 1/2 ( 0.1x120x120)

= 0.1x120x60

=  720m

 

The distance travelled is 720m.

 

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