An object is moving at a velocity of 23 m/s. It accelerates to a stop over a time of 8.3 s. Calculate the acceleration.

25pts the diagram shows the positions of the sun, moon and earth during spring tides, when the high tides are at their highest and low tides at their lowest. what is it about these positions that causes these high and low tides?

It is really hard for me right know

An object dropped from cliff falls with a constant acceleration of 10 metre per second square find its speed of two seconds after it was dropped