Laws of MotionHard
Question
There is an inclined surface of inclination θ = 30o. A smooth groove is cut into it forming angle a with AB. A steel ball is free to slide along the groove. If the ball is released from the point O at top end of the groove, the speed when it comes to A is: [g = 10 m/s2]
Options
A.
B.
C.
D.
Solution
length of groove = 
= 5m
acceleration along the incline = gsinθ = g sin 30o = g/2
acceleration along the groove = g/2 cos (90−α) = g/2 sinα =
= 4m/s2
v2 = 2as
v =
= 5macceleration along the incline = gsinθ = g sin 30o = g/2
acceleration along the groove = g/2 cos (90−α) = g/2 sinα =
= 4m/s2v2 = 2as
v =
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