Why is there a 1/2 instead of 1 in the formula for kinetic energy

What happens to the period of a pendulum and the period of a spring as the amplitude of the oscillation increases? Briefly give an explanation for this relationship.

Compared to radio waves, ultraviolet rays have relatively

A hanging chair is suspended on a spring from the ceiling. The 5880 N/m spring stretches from 15 cm long to 25 cm long when you sit in the chair. How hard is the spring pulling to lift you?

A student is pushing a box across the room. To push the box three times farther, the student needs to do how much work?

Consider three identical metal spheres, a, b, and c. sphere a carries a charge of + 5q. sphere b carries a charge of - q. sphere c carries no net charge. spheres a and b are touched together and then separated.

What was the second weather condition that made it a struggle for some finches to survive

Tidal-power-generating facilities are common worldwide. True False

How do mountins building and volcanos relate to plate motion at convergent boundaries

A 20kg box is dropped 13m. how much work is done

Suppose a person whose mass is m is being held up against the wall with a constant tangential velocity v greater than the minimum necessary. Find the magnitude of the frictional force between the person and the wall