hims100
Jul13-03, 11:08 AM
Hi all!!!!!!
can somebody help me out in solving following 2 questions:
1. A man weighing 80 kg is standing on a trolley weighing 400 kg.The trolly is resting on a frictionless horizontal rail .If the man starts walking on the trolley along the rail at a speed of 1 m/s with respect to the trolley ,find his displacement relative to the ground after 4 sec.
2. for steel surface the coefficient of friction is 0.8 and between teflon surfaces 0.04. A steel block of mass 2 kg kept on a steel surface has a limiting frictional force f. What should be the mass of a teflon block kept on a teflon surface to have the limiting frictional force same as f . Take g =10 m/s.
Thanking in anticipation
can somebody help me out in solving following 2 questions:
1. A man weighing 80 kg is standing on a trolley weighing 400 kg.The trolly is resting on a frictionless horizontal rail .If the man starts walking on the trolley along the rail at a speed of 1 m/s with respect to the trolley ,find his displacement relative to the ground after 4 sec.
2. for steel surface the coefficient of friction is 0.8 and between teflon surfaces 0.04. A steel block of mass 2 kg kept on a steel surface has a limiting frictional force f. What should be the mass of a teflon block kept on a teflon surface to have the limiting frictional force same as f . Take g =10 m/s.
Thanking in anticipation