D
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What is the tension in the string in trial 4 if the pendulum bob swings through equilibrium with a speed of 4 m/s? Mass of rope is 100 g, assume g = 10 m/s^2
A. 0.4 N
B. 0.6 N
C. 1.0 N
D. 1.4 N
I flipped through my class notes from physics, and could only find the equation, velocity = square root of T*L/m
Using this equation, I got A as an answer. However, the answer was D.
They used the equation: T - mg = mv^2/r
What is this? I never learned this equation in undergrad physics. I've noticed that BR physics questions often cover material that was never taught to me in my physics courses. Is this particular one necessary to know?
A. 0.4 N
B. 0.6 N
C. 1.0 N
D. 1.4 N
I flipped through my class notes from physics, and could only find the equation, velocity = square root of T*L/m
Using this equation, I got A as an answer. However, the answer was D.
They used the equation: T - mg = mv^2/r
What is this? I never learned this equation in undergrad physics. I've noticed that BR physics questions often cover material that was never taught to me in my physics courses. Is this particular one necessary to know?