- #1
clavin
- 11
- 0
well my first qs is
lets say i have a pulley and rope system
and two blocks each of mass m hanging from either end of the rope which goes over a pulley
the pulley has a mass of 1 kg, frictionless and rope is massless and frictionless
now if i were to analyze the force on the pulley it would be equal to 2mg
now what i want to know is how is the system applying this 2mg force on the pulley
cuz for all the points on the rope that touch the pulley have tension tangential to the pulley
physically i can see that it would be 2mg but how do u explain it through physics
second let's say i have two black placed one over the other
and the ground and the surface of the blacks all have friction
now let's say i apply some force on the block(the force isn't high to exceed the limiting friction from either the ground or the block above) touching the ground
so how to judge why and which of the two, ground and the upper block,
will apply the friction force first or is it that both will apply the friction simultaneously
when a car goes on a horizontal circular turn with velocity v , the friction provides the centripetal force. now will a friction also act in the direction opposite to v? if not why?
and lastly
why on a circular turn do the tyre ski outwards
well i mean how come there is relative motion radially which gives rise the friction force in radial direction
and let's say the friction is not high enough to prevent the skidding
then what would be the force or velocity with which the car will skid outwards(i.e. if it is possible to calculate)
i wud be thankful if u can answer even one of the qs
cya
lets say i have a pulley and rope system
and two blocks each of mass m hanging from either end of the rope which goes over a pulley
the pulley has a mass of 1 kg, frictionless and rope is massless and frictionless
now if i were to analyze the force on the pulley it would be equal to 2mg
now what i want to know is how is the system applying this 2mg force on the pulley
cuz for all the points on the rope that touch the pulley have tension tangential to the pulley
physically i can see that it would be 2mg but how do u explain it through physics
second let's say i have two black placed one over the other
and the ground and the surface of the blacks all have friction
now let's say i apply some force on the block(the force isn't high to exceed the limiting friction from either the ground or the block above) touching the ground
so how to judge why and which of the two, ground and the upper block,
will apply the friction force first or is it that both will apply the friction simultaneously
when a car goes on a horizontal circular turn with velocity v , the friction provides the centripetal force. now will a friction also act in the direction opposite to v? if not why?
and lastly
why on a circular turn do the tyre ski outwards
well i mean how come there is relative motion radially which gives rise the friction force in radial direction
and let's say the friction is not high enough to prevent the skidding
then what would be the force or velocity with which the car will skid outwards(i.e. if it is possible to calculate)
i wud be thankful if u can answer even one of the qs
cya