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Let's tackle parts (d) and (e) of this problem systematically.

### (d) Speed of the Object at \( t = 2.0 \, \text{s} \)
The speed of the object in simple harmonic motion (SHM) can be found using the derivative of the position function with respect to time, which gives us the velocity function. In SHM, position \( x(t) \) is typically given by:
\[
x(t) = A \cos(\omega t + \phi)
\]
where:
- \( A = 0.10 \, \text{m} \) (amplitude),
- \( \omega = 0.785398 \, \text{rad/s} \) (angular frequency),
- \( \phi \) is the phase constant, which we can assume to be zero if starting from the maximum displacement.

The velocity \( v(t) \) in SHM is:
\[
v(t) = -A \omega \sin(\omega t + \phi)
\]
To find the speed at \( t = 2.0 \, \text{s} \), substitute the values for \( A \), \( \omega \), and \( t \).

### (e) Magnitude of the Object's Acceleration at \( t = 2.0 \, \text{s} \)
The acceleration \( a(t) \) in SHM is given by:
\[
a(t) = -A \omega^2 \cos(\omega t + \phi)
\]
Again, substitute \( A \), \( \omega \), and \( t \) into this equation to find the acceleration magnitude at \( t = 2.0 \, \text{s} \).

Would you like detailed calculations for each step? 

Here are some related questions to expand your understanding:
1. How would the results change if the mass of the object were doubled?
2. What would be the maximum speed and acceleration of the object?
3. How is angular frequency affected by changes in spring constant or mass?
4. What would the velocity be at \( t = 4.0 \, \text{s} \)?
5. How does the period of oscillation relate to the angular frequency?

**Tip:** In SHM, the velocity and acceleration are always out of phase by 90 degrees, meaning when one is zero, the other is at its maximum.

A 0.35-kg mass is attached to the end of a spring and set into oscillation on a horizontal frictionless surface. Determine the speed of the object at t = 2.0 s and the magnitude of the object's acceleration at t = 2.0 s.

Explore how to determine the speed and acceleration of a mass attached to a spring in simple harmonic motion (SHM) at a specific time. The problem involves using key SHM formulas for velocity and acceleration, along with an amplitude of 0.10 m and angular frequency of 0.785 rad/s. Ideal for high school physics students.

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