Answer:
the final velocity of the car is 59.33 m/s [N]
Explanation:
Given;
acceleration of the car, a = 13 m/s²
initial velocity of the car, u = 120 km/h = 33.33 m/s
duration of the car motion, t = 2 s
The final velocity of the car in the same direction is calculated as follows;
v = u + at
where;
v is the final velocity of the car
v = 33.33 + (13 x 2)
v = 59.33 m/s [N]
Therefore, the final velocity of the car is 59.33 m/s [N]
Answer:
Explanation:
Let the incident intensity of light on the polariser is Io.
Let the angle of transmission is θ.
According to the law of Malus,
The intensity of light coming out form the polariser is given by
I = IoCos²θ
The mean or the average value of Cos²θ is 1/2
So, the intensity of light coming out from the polariser is
I = Io/2
Thus, the 50% of light is transmitted by the polariser.
Average speed is the answer
