Starting from rest , the acceleration of a particle is a=2(t-1). The velocity of the particle at t=5s is:
15 m/sec
25 m/sec
5m/sec
None of these
As we discussed in
Velocity -
Rate of change of displacement with time.
Formula
- wherein
E.g. A car moving along a straight line. It moves from O to P (60 m) in 18 sec and returns from P to O (60 m) in 60 sec
Find velocity.
Acceleration -
Rate of change of velocity with time.
For: a=change in velocity / change in time
- wherein
Eg. A car starting from rest accelerates uniformly to a speed of 75 m/s in 12 seconds. What is car’s acceleration ?
0
75 m/s
?
a = 6.25 m/s2
a= 2(t-1)
given t = 5sec
15 m/sec
Option 1)
15 m/sec
Option is Correct
Option 2)
25 m/sec
Option is incorrect
Option 3)
5m/sec
Option is incorrect
Option 4)
None of these
Option is incorrect