Which law states, “an induced emf gives rise to a current whose magnetic field opposes the change in magnetic flux that produced it.”?

In order for the bug to fly through the air a force has to push the bug forward. identify this force. how does the bug produce

Imagine that someone pushes one marble toward a motionless marble. would there still be action-reaction forces involved in the collision? how might the marbles’ motions be changed? ?

Two steel balls, each of mass m, are welded to a light rod of length l and negligible mass and are initially at rest on a smooth horizontal surface. a horizontal force of magnitude f is suddenly applied to the rod as shown. determine (a) the instantaneous acceleration a of the mass center g and (b) the corresponding rate at which the angular velocity of the assembly about g is changing with time.