Forces and Motion

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Question 2
Medium61%

A particle A A\,A of mass 5 kg rests on a smooth horizontal table. Particle A A\,A is attached to one end of a light inextensible string which passes over a smooth pulley fixed to the edge of the table. The other end of the string is attached to particle B B\,B of mass 4 kg which hangs freely below the pulley 1.4 m above the ground. The system is released from rest with the string taut. Particle A A\,A does not reach the pulley before B B\,B reaches the ground.

Diagram for Question 2: A pulley system on a smooth horizontal table. Particle A (5 kg) is on the table, connected by a string over a pulley at the edge to particle B (4 kg), which hangs 1.4 m above the ground. The string is horizontal on the table and vertical off the edge.

a.

Find the tension in the string before B B\,B hits the ground.

[4]
b.

Find the time taken by B B\,B to reach the ground.

[5]

Forces and Motion Questions

  1. AS Level
  2. /Maths
  3. /Forces and Motion