Question

(b)A trolley while going down an inclined plane has an acceleration of 2cms-². What will be its velocity 3s after the start?

Answer 1

Answer:

50 will be the velocity of the plane

Answer 2

Given-

Acceleration = 2 cm/s²

Initial speed = 0 m/s

Time taken = 3 seconds

   

To Find-

Final speed-?

   

Formula to be used-

$\boxed{\bf{ v = u + at }}$

where,

v= Final speed

u= initial speed

a= acceleration

t= time

   

Solution -

At First change Acceleration cm/s² to m/s²

we know,

$\sf{ 1m= 100cm}$

$\sf{\implies 1cm= \dfrac{1}{100} m}$

$\sf{ \implies 2cm= \dfrac{2}{100 } }$

$\sf{\implies Acceleration = 0.02m/s^2}$

   

Now,

By using 1st equation of motion,

 

v = u + at

 

Put value in the formula we get,

$\sf{ \implies v = 0 + 0.02 \times 3}$

 

$\sf{\implies v = 0.02 \times 3}$

 

$\sf{ \implies v = 0.06 m/s }$

 

$\bf{\underline{\pink{Hence, the\ final\ velocity\ of\ trolley\ is\ 0.06 m/s.}}}$