In this activity,
1. The force requi
quired to slide the wooden block is
a) very much O(b)more
0 (d) the least
(c) less
The spring balance records
Answers
Explanation:
whenever two surfaces move or try to move across each other.
Friction always opposes the motion. Friction is dependent on the texture of both surfaces and on the contact area of two bodies.
On a leveled surface, the normal force is always equal and opposite to the weight of the object.
The force of friction depends upon both surfaces in contact and the normal force.
When the force is applied on an object to overcome its static friction, this force is called force of static friction.
To stop a moving object, a force must act in the opposite direction to the direction of motion. The force that opposes the motion of an object is called friction.
The maximum value of force of friction, acting between the two solid surfaces just before the object sets into motion is called limiting force of friction.
Limiting friction acts tangential to the surfaces in contact in opposite direction of motion.
Sliding friction: When the object is kept on a surface and pushed with a force to slide on the surface, is called sliding friction. The weight of the object and the type of surface on which it has to move will determine the amount of force required to slide it. The weight of the object also decides the force it will take to slide. As heavy object will exert more pressure on the surface hence the sliding friction will be greater. Type of friction
Fluid friction: All substances that flow are called the fluids. Air, water and oil are all fluids. When fluids offer resistance to the flow or motion of the bodies it is called fluid friction. As an object falls, air resistance pushes the object upward.
Rolling friction: When an object rolls on a surface, the contact between the rolling body and the surface is called rolling friction. E.g., when riding a cycle the contact between the tires rolling on the road provides the rolling friction. The force needed to overcome this rolling friction is always less than the sliding friction. Hence, by reducing the surface of contact between two bodies its friction can be reduced.
EXPERIMENT
Aim
To establish a relationship between the weight of a rectangular wooden block lying on a horizontal table and the minimum force required to just move it using a spring balance.