Topic 8 - Forces and Newton’s laws

• Light inextensible string. What does light suggest?

  The string has no mass
• Light inextensible string. What does inextensible suggest?

  The tension is constant.
• rough horizontal table. What does this suggest?

  This suggests there is a force of friction acting upon the particles
• Smooth fixed pulley. What does this suggest?

  There is no friction acting upon the particles