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Across: 1. The product of force acting on a body and the time-interval for which it acts 3. The forces, of which the lines of action pass through the same point, are called the __________ forces. 6. A way of reducing kinetic friction in a machine 7. Which is required to put a stationary body in motion or stop a moving body? 8. __________ motion would take place (but does not actually take place) under the applied force, if friction were absent. 9. The product of the mass of a body and its velocity
Down: 2. The condition, in which the resultant (net) force of all the external forces acting on a particle, becomes zero 4. If the net external force is zero, a body at rest continues to remain at rest and a body in motion continues to move with a uniform velocity 5. Frictional force that opposes relative motion between surfaces in contact is called ________ friction.