When do the distance and magnitude of displacement become equal?

. In which of the following cases of motions, the distance moved and the magnitude of the displacement are equal? i. If the car is moving on a straight road ii. If the car is moving in circular path iii. The pendulum is moving to and fro iv. The earth is moving around the sun

Under what condition the distance and displacement of a moving object will have the same magnitude ?

The magnitude of distance is always

Distinguish between Distance and Displacement.

The two ends of a spring are displaced along the length of the spring. All displacements have equal magnitudes. In which case or cases the tension or compression in the spring will have as maximum magnitude?

When the distance between the two atoms becomes gamma_(0) , then the inter atomic force will be,