if a body is moving with velocity 20 m/ s and an acceleration of 2m /

1.	if a body is moving with velocity 20 m/ s and an acceleration of 2m / s² is acting on it find velocity after 10 sec and distance travelled by it
Answer» GIVEN :– • Initial velocity (u) = 20 m/s • Acceleration (a) = 2 m/s² TO FIND :– • Velocity after 10 sec (v) = ? • Distance travelled in 10 sec (D) = ? SOLUTION :– • We KNOW that – $\\ \dashrightarrow \large { \boxed{ \bold{a = \dfrac{v - u}{t} }}}\\$ • Put the values – $\\ \implies { \bold{2 = \dfrac{v - 20}{10}}}\\$ $\\ \implies { \bold{2 \times 10= v - 20}}\\$ $\\ \implies { \bold{20= v - 20}}\\$ $\\ \implies { \bold{ v = 20 + 20}}\\$ $\\ \implies \large { \boxed { \bold{ v = 40 \: \dfrac{m}{s} }}}\\$ • Now LET's find travelled distance – $\\ \dashrightarrow \large { \boxed{ \bold{ {v}^{2} - {u}^{2} = 2as}}}\\$ $\\ \implies { \bold{ {(40)}^{2} - {(20)}^{2} = 2(2)D}}\\$ $\\ \implies { \bold{1600 - 400 = 4D}}\\$ $\\ \implies { \bold{1200 = 4D}}\\$ $\\ \implies { \bold{D = \cancel \dfrac{1200}{4} }}\\$ $\\ \implies \large{ \boxed { \bold{D = 300 \: m}}}\\$