JAMB - Physics (2011 - No. 3)
If it takes an object 3s to fall freely to the ground from a certain height, what is the distance covered by the object?
90 m
30 m
45 m
60 m
解释
S = (1)/2gt2
S = (1)/2 x (10)/1 x 32 =5 x 9 = 45 m
S = (1)/2 x (10)/1 x 32 =5 x 9 = 45 m