A block is sliding on a frictionless surface along a loop-the-loop, as shown bel

Question

A block is sliding on a frictionless surface along a loop-the-loop, as shown below. The block is moving fast enough that it never loses contact with the track. Match the points along the track to the appropriate free-body diagrams. Match each lettered point on the track to the free-body diagram to which it corresponds. Point A Point B Point C Point D -Select- .-Select Select | -Select- 1. 2. 3. 5. 5. -12 points Tipler6 5.P.084 My Notes Ask Your Teacher The string of a conical pendulum is 54.0 cm long and the mass of the bob is 0.26 kg. (a) Find the angle between the string and the horizontal when the tension in the string is two times the weight of the bob (b) Under those conditions, what is the period of the pendulum?

Explanation / Answer

First question -

At point A -

Weight mg acting in the downward direction.

Centrifugal force acting outside the center.

So option (5) is correct.

At point B, weight mg and centrifugal force due to rotation both acting in the downward direction.

So, option (2) is correct answer.

At point C, option (3) is the correct answer.

At point D, weight mg acting downward and and centrifugal force acting outside the center. So, option (1) or (4) both are correct.

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