The pendulum shown makes a full swing from ??/4 to +?/4 . Ignore friction and as

Question

The pendulum shown makes a full swing from ??/4 to +?/4 . Ignore friction and assume that the string is massless. The eight labeled arrows represent directions to be referred to when answering the following questions.

Part B

What is the direction of a ?   when the pendulum is at position 1?

Enter the letter of the arrow parallel to a ?   .

Part C

What is the direction of a ?   at the moment the pendulum passes position 2?

Enter the letter of the arrow that best approximates the direction of a ?   .

Part D

What is the direction of a ?   when the pendulum reaches position 3?

Give the letter of the arrow that best approximates the direction of a ?   .

Part E

As the pendulum approaches or recedes from which position(s) is the acceleration vector a ?   almost parallel to the velocity vector v ?   .

Explanation / Answer

when the pendulum is at position 1, direction of a_vec is H..
the direction of a_vec at the moment the pendulum passes position 2, is origin
the direction of a_vec at the moment the pendulum reaches position 3 is F   

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