Weight force
Where does the weight force’s vector looks towards?
The vector looks towards the below.
What thigs can exert elastic force?
Springs, elastics and rovescio can exert elastic force.
What are the two types of sliding friction force?
Dinamic friction force anche static friction force.
When the object isn’t mooving.
How to calculate the weight force?
Fp=mg
How to calculate the elastic force?
Fe=kx
From What does the static friction coefficent depend?
It depends on the material used
When a material point is in balanced?
When All the forces added result zero.
How to find the projection of the weight force on the inclined plane with the anale â?
Py=p(cosâ)
Px=p(sinâ)
The module of the elastic force is the same of what else?
Is the same of the force that deforms the spring.
How to calculate the maximum static friction force?
Ffmax=(static friction coefficient) Fa_|_
What is the relation betwen centering force and parallel force on a balanced object on an inclined plane?
They have the same modulus.
How is colled the relation betwen the weight force and the static friction coefficient?
it is colled friction force
A spring stretches being subjected to a weight. If the weight doubles, what happens to the stretch?
The stretch doubles, because a spring deforms proportionally to the applied force.
What is the values range that static friction coefficent can reach?
Betwen 0 and 1
What forces act on a material point on an inclined plane?
Weight force, vincolar force, friction force, centering force.
If you have a material pointh Wf=240N, How much is the weight of the material point?
m=Wf:g. = 240:9,81= 24,46g
A spring stretches 2 cm when hanging a 100 g weight. If you replace it with a 300 g weight, how much does the spring stretch?
It stretches by 6 cm, because the stretch is proportional to the weight (3 times greater → 3 times the stretch).
On an inclined plane, what happens to an object if the static friction coefficent is greater than the weight component along the plane?
The object does not slip, because the friction is large enough to balance (or overcome) the downward thrust along the inclined plane.
Having an object m=10kg on an inclined plane h=10cm;l=20cm. Is the material point balanced?
No, the material point isn’t balanced