Suppose an object in free fall is dropped from a building. its starting velocity is 0 m/s. whats its speed (in m/s) of the object after falling 2 seconds?

19.6 m/s

Explanation:

If we take down to be positive, the acceleration due to gravity is 9.8 m/s².

Acceleration = change in velocity / change in time

a = Δv / Δt

9.8 m/s² = (v − 0 m/s) / 2 s

v = 19.6 m/s

The speed after 2 seconds is 19.6 m/s.

the skeletons of most mammals reach a certain size and then stop growing. however, many animals, including some mammals, keep growing throughout their lives. kangaroos, for example, just keep growing and growing until they die. also, the longer an animal lives the greater the chance it might catch some deadly disease.

the temperature in kelvin of 2.0 dm3 of an ideal gas is doubled and its pressure is increased by a factor of four. what is the final volume of the gas