Friction force can be measured by following exot. Fig 5-12 Friction force N∠ Accele rated motion k Unifo motion No mg sMax motion 22 mg fs F 0 0 8121620 g (g) rest moving The maximum force of static friction will be the same as the smallest applied forces necessary to start motionThe maximum force of static friction will be the same as the smallest applied forces necessary to start motion. Fig 5-12 Friction force fsMax rest moving Friction force can be measured by following expt. k f  s f 