At the starting gun a runner accelerates from rest at 1.5 m/s2 for 2.2 s . Q: What is the runner's speed 2.0 s after she starts running?

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 ?

J. j. thomson’s experiment disproved the theory that an atom

You've already seen the value of 9.8 in this lesson. what's this value called? what quantity does it represent?