Answer:
It is also called law of Malus,the law states that the intensity of a beam of plane-polarized light after passing through a rotatable polarizer varies as square of the cosine of the angle through which the polarizer is rotated from the position that gives maximum intensity expand.
Before u can know it u have to understand it, so go through it over and over again and u will get it.
Given parameters:
Acceleration of the car = 1.6m/s
Initial speed = 80km/hr
Final speed = 110km/hr
Solution:
Time taken to achieve this speed = ?
Solution:
Acceleration is the rate of change of velocity with the time taken.
Mathematically;
a =
where a is the acceleration
V is the final velocity
U is the initial velocity
T is the time taken
Now make the unknown time the subject of the expression;
aT = V - U
T =
Convert the given acceleration to km/hr;
1.6m/s = 1.6 x x
x
= 5.76km/hr
Input the parameters and solve;
T = = 5.2hrs
The time taken is 5.2hrs