Question 110
A particle A A\,A of mass 4 kg lies on a horizontal surface. It is connected by a light inextensible string passing over a small smooth pulley to a hanging particle B B\,B of mass m kgm\text{ kg}m kg. A frictional force of magnitude 5 N acts on AAA. Particle B B\,B accelerates downwards at 2.8 m s-2. Use g=9.8 m s−2g=9.8\text{ m s}^{-2}g=9.8 m s−2.
a.[3]
Determine the tension in the string.
b.[3]
Determine mmm.