Fricitional Forces

Motion of a spinning ‘top’ is an example of A. Centripetal Force B. Centrifugal Force C. Gravitational Force D. Frictional Force

A force of 20N is applied on a body of mass 5 kg resting on a horizontal plane. The body gains a kinetic energy of 10 after is moves a distance 2m. The fricitional force is

Which of the following are non - contact forces ? Magnetic force, Frictional force, Gravitional force, Muscular force, Electrostatic force.

Biological forces, mechanical forces and frictional forces are the examples of:

Consider a cylinder of mass M and radius R lying on a rough horizontal plane. It has a plank lying on its top as shown in the figure. A force F is applied on the plank such that the plank moves and causes the cylinder to roll. The plank always remains horizontal. There is no slipping at any point to contact. (a) what are the directions of the fricition forces acting at A and B on the plank and the cylinder ? (b) Calculate the acceleration of the cylinder. (c ) Find the value of frictional force at A & B .

A chain of mass m and length l rests on a roung surfced table so that one of its ends hangs over the edge. The chain starts sliding off the table all by itself provided the overhanging part equals 1//3 of the chain length. What will be the total work performed by the fricition forces acting on the chain by the moment is slides completely off the table ? Friction cofficient is mu

Two blocks of mass 10 kg and 30 kg are kept as shown in the figure. The surface between the block is fricitional while the ground is smooth. A horizontal force of magnitude 60 N is applied horizontally on the upper block. Find the frictional force on block of mass 30 kg ?

A block lies on a floor. (a) What is the magnitude of the frictional force on it from the floor ? (b) If a horizontal force of 5N is now applied to the block. But the block dose not move. What is the magnitude of the fricition on it ? (c) If the maximum value f_(c "max") of the static frictional force on the block is 10 N, will the block move if the magnitude of the horizontally applied force is 8 N? (d) If it is 12 N ? (e) What is te magnitude of the frictional force in part (c) ?