You are standing on the edge of a rotating merry-go-round. You feel an acceleration pointing towards the center of the merry-go -round. This means: a) The rate of rotation of the merry-go-round is increasing. b) The rate of rotation of the merry-go-round is decreasing. c) The rate of rotation of the merry-go-round is constant. d) We cannot say anything about the rate of rotation. e) The merry-go-round is not rotating, it is at rest. hoop and a disk with uniform mass distribution have the sa- me radius but the total masses are not known. Can they both roll down a ra- mp without slipping and reach the bottom in the same time? And if s- o, what can you deduce about the relative masses? a) The hoop and disk have the same mass. b) The hoop is heavier, twice the mass of the disk. c) The disk is heavier, twice the mass of the hoop. d) They cannot reach the bottom at the same time regardless of mass. e) The disk is lighter, three-fourth the mass of the hoop. 3. A ball is released from rest on a no-slip surface, as shown i- n the figure. After reaching its lowest point, the ball begins to rise again ,this time on a frictionless surface as shown in the figure. When the ball re- aches its maximum height on the frictionless surface, it is: a) at a greater height than when it was released. b) at a lesser height than when it was released. c) at the same height than when it was released. d) Impossible to tell without knowing the ball’s mass. e) Impossible to tell without knowing the ball’s radius.
Simple harmonic motion
Simple harmonic motion is a type of periodic motion in which an object undergoes oscillatory motion. The restoring force exerted by the object exhibiting SHM is proportional to the displacement from the equilibrium position. The force is directed towards the mean position. We see many examples of SHM around us, common ones are the motion of a pendulum, spring and vibration of strings in musical instruments, and so on.
Simple Pendulum
A simple pendulum comprises a heavy mass (called bob) attached to one end of the weightless and flexible string.
Oscillation
In Physics, oscillation means a repetitive motion that happens in a variation with respect to time. There is usually a central value, where the object would be at rest. Additionally, there are two or more positions between which the repetitive motion takes place. In mathematics, oscillations can also be described as vibrations. The most common examples of oscillation that is seen in daily lives include the alternating current (AC) or the motion of a moving pendulum.
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