Which car, moving from rest, has an average acceleration of 2.0 m s–2?
A A car reaching a speed of 10 m s–1 in 2 s.
B A car reaching a speed of 20 m s–1 in 5 s.
C A car reaching a speed of 30 m s–1 in 10 s.
D A car reaching a speed of 40 m s–1 in 20 s.
what is full meaning of 2.0 m sâ2 and give the answer of this question.
Ans 2:
Class : Class 9
The correct answer is 'd'. M/s^2 or metre per second square. That is because the formula for acceleration is change in velocity /time.
The SI unit of velocity is m/s (as it is displacement /time) and the SI unit of time is second. So the SI unit of acceleration is m/s/s which can also be written as m/s^2
Ans 4:
Class : Class 8
option D is correct as
Average acceleration=Final velocity - Initial velocity/Change in time