Question

A pendulum consists of a mass M at the end of a massless string of length L. The mass is initially held stationary with the string horizontal. The mass is then released and swings down. The length of the string is L = 2.51 m and the mass of the object is M = 9.4 kg. When the mass is at the position shown, with the string at an angle θ = 28°, what is the tension in the string? Give your answer in N to at least three digits to avoid being counted incorrect due to rounding. Remember, from considering a pendulum, the relation between the angle and the height in the figure is h = L * (1 - cosθ). For example, θ = 0 ⇒ h = 0, and θ = 90° ⇒ h = L.

          A pendulum consists of a mass M at the end of a massless string of length L. The mass is initially held stationary with the string horizontal. The mass is then released and swings down. 
The length of the string is L = 2.51 m and the mass of the object is M = 9.4 kg.
When the mass is at the position shown, with the string at an angle θ = 28°, what is the tension in the string?
Give your answer in N to at least three digits to avoid being counted incorrect due to rounding.
Remember, from considering a pendulum, the relation between the angle and the height in the figure is h = L * (1 - cosθ). For example, θ = 0 ⇒ h = 0, and θ = 90° ⇒ h = L.

Added by Sarah F.

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