Answer:
After 11.62 sec car will axceed the speed limit
Explanation:
We have given constant acceleration
As the car starts from rest so its initial velocity u = 0 m/sec
Final velocity v = 65 miles/hr
We know that 1 mile = 1609 meters
And 1 hour = 3600 sec
So
From first equation of motion v = u+at
So
t = 11.62 sec
So after 11.62 sec car will axceed the speed limit
Solution :
Given :
The angle of the first maximum with the center is given by :
= 14.5°
The grating distance can be calculated as :
=
When the principal maxima yields at y = 0.488 m and the length from the wall 1.88 m. Thus the equation of the wavelength is :
, where n = 1
The sum of all forces=m(mass) times a(acceleration). F=5.5(kg)*4.2(m/s^2)= 23.1N or D.
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