A 0.25 kg ball is suspended from a light 1.2 m string as shown. The string makes an angle of 35° with the vertical. Let U = 0 when the ball is at its lowest point (θ = 0). Part A: Draw diagram and label coordinates. Part B: What is the gravitational potential energy, in joules, of the ball before it is released? Part C: What will be the speed of the ball, in meters per second, when it reaches the bottom? Part D: Does replacing the ball by a steel sphere of mass 0.75kg at the end increase the maximum speed?
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.
A 0.25 kg ball is suspended from a light 1.2 m string as shown. The string makes an angle of 35° with the vertical. Let U = 0 when the ball is at its lowest point (θ = 0).
Part A: Draw diagram and label coordinates.
Part B: What is the gravitational potential energy, in joules, of the ball before it is released?
Part C: What will be the speed of the ball, in meters per second, when it reaches the bottom?
Part D: Does replacing the ball by a steel sphere of mass 0.75kg at the end increase the maximum speed?
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