April 2024

Static Friction | Limiting Friction

When two bodies that are not moving relative to each other are in contact, the friction force acting between their surfaces is known as static friction or limiting friction. This friction force will prevent one of the bodies from moving over the other, or sliding down a slopped surface, except an applied force is […]

Calculating Force Based On Newton's Second Law Of Motion (4)

Question 1: A ball of mass 5.0 kg hits a smooth vertical wall normally with a speed of 2 ms-1 and rebounds with the same speed. Determine the impulse experienced by the ball. Solution: From Newton’s second law of motion, Force is directly proportional to the rate of change of momentum. I.e. F = […]

Impulse

The Impulse Of A Force The impulse of a force is the product of the force and time. From the equation of force, F = m(v-u)/t Ft = mv – mu Ft is the Impulse of the force, and as shown above, it is equal to change in momentum (mv – mu). The symbol […]

Calculating the values of friction forces acting between the surfaces of two bodies in contact with each other, using friction formula and equation, and applying the concept of static friction.

Question 1: A body of mass 5kg is placed on a horizontal plane. It is found that a force of 10N applied horizontally to the body is just about to move it. Calculate the coefficient of static friction between the body and the plane. Solution Given: since the force of 10N was applied when […]

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