The `v -t` graph of a moving object is given in figure. The maximum acceleration is

Options

A. `1 cm^(-2)`
B. `2 cm^(-2)`
C. `3 cm^(-2)`
D. `6 cm^(-2)`

Answer

D

Explanation

Maximum acceleration means maximum change in velocity in minimum time interval.
In time interval t = 30 to t = 40 s
`a=(Delta upsilon)/(Delta t)=(80-20)/(40-30)=(60)/(10)=6 cms^(-2)`