Acar is at rest at the top of a driveway that has a slope of 12.5°. if the brake of the car is released with the car in neutral gear find: a. the acceleration of the car down the drive. b. the time it takes for the car to reach the street, 8.0m away.

Explanation:

angle of inclination, θ = 12.5°

initial velocity, u = 0 m/s

distance, s = 8 m

(a) acceleration, a = g Sinθ  

a = 9.8 x Sin 12.5°

a = 2.12 m/s²

(b) Let t be the time taken to reach the street.

Use II equation of motion

s = ut + 1/2 at²

8 = 0 + 0.5 x 2.12 x t²

t = 2.75 second

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the shielding can reduce the coupling of radio waves, electromagnetic fields and electrostatic fields. a conductive enclosure used to block electrostatic fields is also known as a faraday cage. the amount of reduction depends very much upon the material used, its thickness, the size of the shielded volume and the frequency of the fields of interest and the size, shape and orientation of apertures in a shield to an incident electromagnetic

from wikipedia