Question

a body starts from rest and accelerate the car with 4m/s square acceleration . find its speed after 4 sec​

Answer 1

$\large{\underline{\underline{\color{blue}{\boxed{\colorbox{black}{Given-:}}}}}}$

• $\pink{Initial\:velocity,u=0m/s}$
• $\pink{Acceleration,a=4m/s²}$
• $\pink{Time\:taken,t=4s}$

$\large{\underline{\underline{\color{blue}{\boxed{\colorbox{black}{To\:Find-:}}}}}}$

• $\red{Final\:velocity,v}$

$\large{\underline{\underline{\color{blue}{\boxed{\colorbox{black}{Solution-:}}}}}}$

• $\large\sf\fbox\purple{According\:to\:the\:question}$

It is given that the body starts from rest and accelerate the car with 4m/s². we have to calculate the final velocity of the car. so using 1st equation of motion

• $\green{v=u+at}$

$\bold{Where,}$

• $\red{v\:denote\:final\:velocity}$
• $\red{u\:denote\:initial\:velocity}$
• $\red{a\:denote\:acceleration}$
• $\red{t\:denote\:time\:taken}$

$\large\sf\fbox\purple{Substitute\:the\:value\:we\:get}$

$\boxed{=>v=0+4×4}$

$\boxed{=>v=16m/s}$

• $\orange{Hence,the\:final\:velocity\:of\:body\:}$

$\orange{is\:16m/s}$

Answer 2

Answer:

Three concentric metallic spherical shells of radii R, 3R,5R are given charges Q1 Q2 Q3 respectively it is found that the surface charge density on the outer surface of the shells are equal then find the ratio of the charges given to the shells Q1 Q2 Q3.

Answer 3

Answer:

Three concentric metallic spherical shells of radii R, 3R,5R are given charges Q1 Q2 Q3 respectively it is found that the surface charge density on the outer surface of the shells are equal then find the ratio of the charges given to the shells Q1 Q2 Q3.