Question

if a particle is moving in a straight line when s=3t²+2t+1 then find 1. velocity of the particle at t=2sec 2.what is acceleration of the particle??​

Answer 1

GiveN :

• s = 3t² + 2t + 1

To FinD :

• Velocity of Particle at t = 2 s

SolutioN :

⇒s = 3t² + 2t + 1

Diff wrt dt

⇒ds/dt = d(3t² + 2t + 1)/dt

⇒v = 2*3t + 2 + 0

⇒v = 6t + 2__________[1]

ㅤㅤㅤㅤㅤㅤㅤPut t = 2 s

⇒v = 6(2) + 2

⇒v = 12 + 2

⇒v = 14

$\therefore$ Velocity at t = 2s is 14 m/s

_________________________

Diff (1) wrt. dt

⇒dv/dt = d(6t + 2)dt

⇒a = 6 + 0

⇒a = 6

$\therefore$ Acceleration of particle is 6 m/s².

Answer 2

Answer:

iron nail ductility

Explanation:

mean of ductility and lustre and brittle