An 2.2 kg object accelerates at 4.0 m/s^2. What is the acceleration?

Spend time observing or thinking about events that involve matter and energy. which events can you explain? which events can’t you explain?

When the force acting on an object points at least partially in the direction of the motion the work done is considered to be negative

The average atmospheric pressure on earth is approximated as a function of altitude by the relation patm = 101.325 (1 − 0.02256z)5.256, where patm is the atmospheric pressure in kpa, and z is the altitude in km with z = 0 at sea level. determine the approximate atmospheric pressures at atlanta (z = 306 m), denver (z = 1610 m), mexico city (z = 2309 m), and the top of mount everest (z = 8848 m).