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Questions  

A 0.10 kg block oscillates back and forth along a horizontal surface. Its displacement from the origin is given by: x=(10cm)cos[(10rad/s)t+π/2rad]. What is the maximum acceleration experienced by the block 

a
10  m​/​s2
b
10 π m​/​s2
c
10π2 m​/​s2
d
10π3 m​/​s2

detailed solution

Correct option is A

a=10×10−2m and ω=10 rad/secAmax=ω2a=10×10−2×102=10 m/sec2

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A horizontal platform with an object placed on it is executing S.H.M. in the vertical direction. The amplitude of oscillation is 3.92×103m . What must be the least period of these oscillations, so that the object is not detached from the platform 


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