Question

1.) Give the three mathematical definitions of conservative forces?

2.) Explain what the expression "Inertial force" means? and why are inertial forces not really forces?

3.) For pulley-type simple machines specifically, the ideal mechanical advantage is equal to ____?

4.) for ramp-type simple machines specifically, the ideal mechanical advantage is equal to ____?

Answer 1

1) definition 1

if the work done by a force in a closed cycle is zero. that force is known as conservative force.

definition 2

work done by the force depends only on the initial and final position of the object. the force is known as conservative force.

definition 3

change in work done by a conservative force is equals to the negative of change if potential energy of the system.

2) when an object in a motion s being observed from an non-inertial frame. we assume that there is a force acting on the object which can not be observed from the non-inertial frame that force is known as inertial force. like fictitious force

inertial forces are not the real forces but we consider them to find the net force acting on the object which can not be observed from the non-inertial frames.

3) number of the ropes supporting the load gives the mechanical advantage of a pulley type simple machines.

4)the ratio of inclined length of the ramp and height of the ramp (L/H) gives the mechanical advantage of a ramp type simple machines