Question

A ball starts from rest and rolls down 16 m an inclined plane in 4 second
1).What is the acceleration of th e ball
2).What is the velocity of the ball at the bottom of the inclined

Answer 1

u=0,  s = 16 m   ,   t = 4 s
s = u t + 1/2 a t² 
=> 16 = 0 + 1/2 * a * 4²
=> a = 2 m/s²       (along the slope)

v = u + a t 
   = 0 + 2 * 4 =  8 m/s  (along the slope)

=====> We can also find the slope of the incline.
a = g sin θ 
=> sin θ = 2 /10 = 1/5
=>  θ = Sin⁻¹ 0.20

Answer 2

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