A mass hanging from a spring is set in motion and its ensuing velocity is given by v(t) = - 4t sin at for t20. Assume that the positive direction is upward and s(0) = 4.
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.

![**Motion of a Mass on a Spring:**
In this problem, a mass hanging from a spring is set in motion. The velocity of the mass as a function of time \(v(t)\) is given by:
\[ v(t) = -4\pi \sin \pi t \]
where \( t \geq 0 \).
**Assumptions:**
- The positive direction is considered to be upward.
- The initial position of the mass \( s(0) \) is given as 4.
**Analysis:**
1. **Understanding the Velocity Function:**
The velocity function describes the rate of change of the position of the mass with respect to time. In this case, the velocity is a sinusoidal function indicating oscillatory motion, characteristic of a spring-mass system.
2. **Direction and Initial Condition:**
Since the positive direction is upward, the initial position \( s(0) = 4 \) implies that the mass starts from a position 4 units above a defined reference point.
**Expected Outcomes:**
By integrating the velocity function, the position function \( s(t) \) can be determined, providing insight into the displacement of the mass over time. The sine component in the velocity function suggests periodic motion, typical behavior for objects attached to a spring.
**Application:**
Understanding the motion of masses on springs is crucial in various fields such as mechanical engineering, physics, and even biological systems where similar oscillatory motions are observed.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F777e0514-8160-4940-b57c-96884b4e2915%2F81c4cb8e-75f2-4ce9-9f91-cffc8f2004c2%2F1ngdb8y_processed.png&w=3840&q=75)

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