One of your classmates drew a force diagram for a pendulum bob at the bottom of its swing. He put a horizontal force arrow
in the direction of the velocity. Evaluate his diagram by choosing from the statements below:
(a) He is incorrect since the force should point partly forward and tilt partly down.
(b) He is incorrect since there are no forces in the direction of the object’s velocity.
(c) He is correct since any moving object has a force in the direction of its velocity.
(d) He is correct but he also needs to add an outward (down) force.
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