Question

A ball of mass 50g is fixed to the end of a 40 cm long string of negligible mass. The other end of the string is tied to a fixed point. The ball is free to swing on the string. Initially, the ball is held so the string is taut and horizontal. The ball is then released and is observed to a swing in a vertical plane.

A) Neglecting friction, the maximum kinetic energy of the ball as it swings is closest to:

1. 0.2 J

2. 2 J

3. 20 J

4. 200 J

5. 2000 J

B) Neglecting friction, the time it takes the ball to return to its original position is closest to:

1. 0.2 s

2. 0.8 s

3. 1.3 s

4. 2.8 s

5. 12.6 s

C) The maximum tension in the string will be:

1. 0.5 N

2. 1.0 N

3. 1.5 N

4. 2.0 N

5. 2.5 N

Answer 1