Kinematic: an object drop 20m from a cliff. if it started at rest and is going 20m/s just before it hits the ground, what is it’s acceleration?

When a book falls from a shelf to the ground without anyone pushing on it, no work is done on the book. true or false

An airplane flies eastward and always accelerates at a constant rate. at one position along its path it has a velocity of 34.3 m/s, it then flies a further distance of 40100 m and afterwards its velocity is 47.5 m/s. find the airplane\'s acceleration and calculate how much time elapses while the airplane covers those 40100 m.

Write the correct abbreviation for each metric unit