Physics · Mechanics
A simple pendulum has a bob of mass m that swings with an angular amplitude of 40°. When the angular displacement of the pendulum is 20°, the tension in the string is:
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1equal to mg cos(40°) regardless of the displacement.
- 2less than mg cos(20°) due to the downward gravitational acceleration.
- 3greater than mg cos(20°) because of the required centripetal force.✓
- 4equal to mg cos(20°) at that point in the swing.
Correct answer
greater than mg cos(20°) because of the required centripetal force.
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