Simple Harmonic Motion - cribME!

5 of 6SHM-9. A mass on a spring oscillates with a certain amplitude A and a certain period T. If themass m is doubled, the spring constant k of the spring is doubled, and the amplitude of motion Ais doubled, THEN the period T...A) increases B) decreases C) stays the same.Answer: stays the sameSHM-10. What is the sign of cos(225 o )? Sign of sin(225 o )?A) cos(225 o ) = (+) , sin(225 o ) = (–)B) cos(225 o ) = (–) , sin(225 o ) = (+)C) cos(225 o ) = (+) , sin(225 o ) = (+)D) cos(225 o ) = (–) , sin(225 o ) = (–)E) None of these. One of them is zero.Answer: cos(225 o ) = (–) , sin(225 o ) = (–)370 o = (3/2). What is cos[(3/2)] and what is sin[(3/2)] ?A) cos[(3/2)] = 1, sin[(3/2)] = 0B) cos[(3/2)] = 0, sin[(3/2)] = 1C) cos[(3/2)] = 1, sin[(3/2)] = 1D) cos[(3/2)] = 0, sin[(3/2)] = 0E) None of theseAnswer: None of these: cos[(3/2)] = 0, sin[(3/2)] = 1SHM-11.A kid is swinging on a swing with a period T. A second kid climbs on with the first, doublingthe weight on the swing. The period of the swing is now...A) the same, T B) 2T C) 2TD) none of these.Answer: the same T. The period of a simple pendulum depends only on g and the length of thependulum L.