a ball is dropped from a height of 50m ? Find the velocity of the ball just before it reaches the ground . do you required the value of the mass to find the velocity
Answers
Answer:
v = 10√10 m/s
Explanation:
Given :
A ball is dropped from a height of 50 m
To find :
the velocity of the ball just before it reaches the ground
Solution :
As the ball is dropped, the initial velocity of the ball is 0 m/s
The distance the ball has travelled from height of 50 m to the ground is 50 m
S = 50 m
Using third equation of motion,
v² - u² = 2as
where
v denotes final velocity
u denotes initial velocity
a denotes acceleration of the object
s denotes the distance covered by the object
In this case, a = g = 10 m/s²
Substitute the values,
v² - 0² = 2(10)(50)
v² = 1000
v = √1000
v = 10√10 m/s
Therefore, the velocity of the ball just before it reaches the ground is 10√10 m/s
We calculated the velocity of the ball without using it's mass as in the expression we used, there is no term of mass. So, we do not require the value of mass to find the velocity.