The formula for finding the acceleration of the car is a = (product of sum and difference of veloc

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06 Dec 2011 acceleration

The formula for finding the acceleration of the car is
a = (product of sum and difference of velocities)/2(total distance)
In a journey of 2 km, initial and final velocities of the car are 18 km/hr and 90 km/hr respectively. Calculate the acceleration.

OPtion

1) 0.2 m/s^2
2) 0.3 m/s^2
3) 0.4 m/s^2
4) 0.5 m/s^2
5) 1944 m/s^2
6) 1956 m/s^2
7) 1998 m/s^2
8) 0.15 m/s^2
9) 0.25 m/s^2
10) none of these

Solution

velocities in m/s are 18*5/18 = 5 m/s and 90*5/18 = 25 m/s
and 2 km = 2000 m
so acceleration = 30*20/2*2000 = 0.15

Correct Option: 8 Best Solution (0)