Question

Which of these methods is easy in moving objects? Why?​

Answer 1

Answer:

Theoretically, the contact surface in perfectly rigid bodies is zero. But, in practice due to deformation, there appears a small contact surface which is quite small compared to sliding surfaces that rub on each other. That's why it is easier to roll than to slide.

Explanation:

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Answer 2

Answer:

In figure (A)

Explanation:

• The force acting between both the object and the surface is known as friction.
• The normal force acts on a level plane due to the load of the body.
• When we pull on an object in the horizontal plane, the vertical component of the force acts vertically downward, increasing the object's weight and increasing friction.
• Friction works in the opposite direction of force, it will be difficult to move the object if the friction is high.
• Pulling an object, on the other hand, causes the vertical component to operate upward, reducing friction forces.