The ceiling of an arena is 79 m above the floor. What is the minimum speed that a thrown ball would need to just reach the
ceiling?
m/s

39.37 m/s²

Explanation:

We are given;

Height from the floor to the ceiling as 79 m

We need to determine the minimum speed for the ball to reach the ceiling.

We will need to know;

Therefore, potential energy = kinetic energy

That is ;

mgh = 0.5 mv²

simplifying it, we get;

gh = 0.5 v² , taking g as 9.81 m/s²

Then;

v² = 79 m × 9.81 m²/s × 2

v² = 1549.98

v = √1549.98

  =39.37 m/s

Therefore, the minimum speed the ball needs to reach the ceiling is 39.37 m/s²

this is an example of "committed" time.

committed time, as contracted time, takes need over essential and available time since it is seen as profitable work. it alludes to the time allotted to keep up a home and family. at the point when a man is commuting using committed time this individual may feel that the drive is an obligation to family, for example, strolling youngsters to class or driving a mate to work. contracted and committed time clients may feel that their commute could really compare to the commute of important or leisure time clients on the grounds that their commute is profitable work. in this manner, they might be more disposed to pick a mechanized method of movement.