See example 3.
https://books.google.com/books?id=BukDAAAAMBAJ&pg=PA1433&lpg=PA1433&dq=a+simple+pendulum+has+a+period+of+2.0s+and+magnitude+of+swing+5cm.find+i-the+velocity+of+the+bob+ii-the+acceleration+of+the+bob&source=bl&ots=gDxmNuClKx&sig=agV4IL0lNHcEuDWK8urzpBYLHkA&hl=en&sa=X&ved=0ahUKEwiypPmekYbUAhVF6YMKHe7lDE4Q6AEILjAB#v=onepage&q&f=false
a simple pendulum has a period of 2.0s and magnitude of swing 5cm.find i-the velocity of the bob ii-the acceleration of the bob
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