Generally, the magnitude of the force of friction depends on
the roughness of the material
. The rougher or bumpier the material, the more friction there will be. The magnitude of the force of friction also depends on the Normal Force. We usually think of the normal force as opposite to weight.
Why friction force does not depend on the area of contact?
Why does friction does not depend upon area of contact ? Because,
even though surface gripping would scale with contact area
, so does other parameters that are in the friction formula. Area therefore appears more times in the expression and turns out to cancel out completely, leaving the formula as f=μn.
Does the force of friction depends on the area of contact?
It does not depend the area of contact
, it doesn’t depend on the sliding speed. Next, there will probably be some type of friction laboratory experiment. In this lab, students will measure coefficients of friction and show that the frictional force doesn’t depend on surface area in contact.
How can a force change the state of motion?
Force applied on an object
may change its speed
. If the force applied is in the direction of the object’s motion, its speed increases. If the force is in the opposite direction to the direction of motion of the object, then the speed of the object decreases.
Why friction can never be entirely eliminated?
Friction can never be entirely eliminated, because
no surface is perfectly smooth
, there are always some irregularities present in it.
Does the force change only the state of motion?
Such an object
will not change
its state of motion (i.e., velocity) unless acted upon by an unbalanced force. Objects resist changes in their velocity.
What Cannot be changed by a force?
D ans will be the right one because
the mass of an object
cannot be changed by force because mass is a property of an object which cannot be changed but the shape or speed or the direction can be changed by force.
What are the two state of motion?
Objects have two “natural” states of motion, at
rest (static equilibrium)
and moving at a constant speed and direction (dynamic equilibrium).
Can we eliminate friction completely Yes or no?
There are several ways to reduce friction: The
use of bearing surfaces that
are themselves sacrificial, such as low shear materials, of which lead/copper journal bearings are an example. Replace sliding friction with rolling element friction, such as with the use of rolling element bearings.
Is friction is always undesirable?
All machines which involve motion convert energy
What are the advantages and disadvantages of friction?
- Friction helps us to walk, turn and stop. …
- Friction helps to wear cap, ring, and belt. …
- Friction help in the transfer of energy. …
- Friction helps in making fire. …
- Friction helps to hold onto objects. …
- Produces unwanted heat. …
- Reduces efficiency of machines. …
- Eco-hazard.
What is state of motion position of rest or position of motion?
Explanation: The state of motion of an object is described by its speed and the direction of motion. The state of rest is considered to be
the state of zero speed
. An object may be at rest or in motion; both are its states of motion.
Which force can cause motion?
Force makes things move or, more accurately, makes things change their motion. Two natural forces that we have experienced are
the force of gravity and magnetic forces magnetic forces
. These two forces act at a distance and do not require direct contact between the objects to function.
What are the other effects of force besides changing the state of motion?
A force acting on an object causes the
object to change its shape or size, to start moving, to stop moving
, to accelerate or decelerate. When there’s the interaction between two objects they exert a force on each other, these exerted forces are equal in size but opposite in direction.
Is force push or pull?
A force is
a push or pull
. Forces cause objects to change their motion. The only way a ball can get from one place to another is to be moved by a force.
Is an object that Cannot be changed?
In object-oriented and functional programming,
an immutable object (unchangeable object)
is an object whose state cannot be modified after it is created. This is in contrast to a mutable object (changeable object), which can be modified after it is created.
