If an object is dropped, how fast will it be moving after falling 21 m?
2 Answers
Jun 29, 2018
Explanation:
Use equation of motion
"v"^2 - "u"^2 = "2aS"
Where
"v =" Final velocity"u =" Initial velocity"a =" Acceleration"S =" Displacement
The object is dropped. So
Explanation:
- Using the formula:
where;
v is the final velocity of the object which we need to find.u is the initial velocity of the object, which is0 since it fell from rest.a is the acceleration of free fall("9.81 m s"^-2) s is the displacement, which is"21 m"
Now all you gotta do is substitute:
So