Question

The rate of change of velocity gives acceleration. A particle has initial velocity 10 〖〗^(−1)and acceleration =√10 . Find the time after which particle comes in rest

Answer 1

Answer:

Initial velocity = u = 3i + 4j

Acceleration = a = 0.4i + 0.3j

Time = t = 10 sec

So, final velocity = v = u + a * t

Or, v = (3i + 4j) + 10 * (0.4i + 0.3j)

Or, v = (3i + 4j) + (4i + 3j)

Or, v = (7i + 7j)

Answer 2

Answer:

final velocity = 0 m/s

initial velocity = 10m/s

acceleration = -√10

time = v-u/a

-10/-√10

√10 sec