Mary jogs for 15 min at 240 m/min, walks the next 10 min at 90 m/min

If the speed of a particle triples ,by what factor does its kinetic energy increase?

Aphysical change is a change in the size, shape,, or stafe of matter true or false

Alead ball is dropped into a lake from a diving board 5m above the water . it hits the water with a certain velocity and then sink with constant velocity in bottom . it reaches the bottom 5 second after it is dropped if g= 10m/s2 . find depth of the lake and average velocity of the ball ?