Question

a car travels with a uniform velocity 10 metre per second the driver applies the brake and comes to rest in 2 second calculate the retardation​

Answer 1

${\bold{\underline{\underline{Answer:}}}}$

${\bold{\therefore Acceleration=-5\:m/s^{2}}}$

${\bold{\underline{\underline{Step-by-step\:explanation:}}}}$

• In the given question information given about a car travels with a uniform velocity 10 metre per second the driver applies the brake and comes to rest in 2 second.

• We have to find the retardation.

$\underline \bold{Given : } \\ \implies Initial \: velocity(u) = 10 \: m/s \\ \\ \implies Time(t) = 2 \: sec \\ \\ \implies Final \: velocity(v) = 0 \: m/s \\ \\ \underline \bold{To \: Find : } \\ \implies Acceleration(a) = ?$

$\bold{Using\:First\:equation\:of\:motion}\\\\\implies v=u+at\\\\\implies 0=10+a\times2\\\\\implies -10=2a\\\\\implies a=\frac{-10}{2}\\\\\bold{\implies a=-5\:m/s^{2}}$

Answer 2

${\bold{\underline{\underline{Answer:}}}}$

${\bold{\therefore Acceleration=-5\:m/s^{2}}}$

${\bold{\underline{\underline{Step-by-step\:explanation:}}}}$

• In the given question information given about a car travels with a uniform velocity 10 metre per second the driver applies the brake and comes to rest in 2 second.

• We have to find the retardation.

$\underline \bold{Given : } \\ \implies Initial \: velocity(u) = 10 \: m/s \\ \\ \implies Time(t) = 2 \: sec \\ \\ \implies Final \: velocity(v) = 0 \: m/s \\ \\ \underline \bold{To \: Find : } \\ \implies Acceleration(a) = ?$

$\bold{Using\:First\:equation\:of\:motion}\\\\\implies v=u+at\\\\\implies 0=10+a\times2\\\\\implies -10=2a\\\\\implies a=\frac{-10}{2}\\\\\bold{\implies a=-5\:m/s^{2}}$