Acceleration by gravity

Question 1

Letter given to acceleration of gravity

Answer 1

g

Question 2

Acceleration of gravity= ?

Answer 2

10m/s^2

Question 3

Define air resistance

Answer 3

A force of friction produced by air preventing the movement of an object.

Question 4

If a ball is dropped and takes 2 seconds to hit the ground, what was the impact speed (acceleration)?

Answer 4

a= change in velocity/time taken
=> 10= civ/2
civ= 2X10= 20m/s