During a game the same batter swings at a ball thrown by the pitcher and hits a line drive. Just before the ball is hit it is traveling at a speed of 20.0 m/sm/s, and just after it is hit it is traveling in the opposite direction at a speed of 30.0 m/sm/s. What is the total work done on the baseball by the force exerted by the bat

The total work done on the baseball by the bat is 36.25 J.

Explanation:

The mass of the baseball is missing which is equal to 0.145 kg.

Given:

Mass of the baseball (m) = 0.145 kg

Initial speed of the baseball (v₁) = 20.0 m/s

Final speed of the baseball (v₂) = 30.0 m/s

Total work done on the baseball by the force exerted by the bat is given using the work-energy theorem which states that the total work done is equal to the change in the kinetic energy of the baseball.

Kinetic energy of a body of mass 'm' and speed 'v' is given as:

Therefore, the work done on the baseball is given as:

Therefore, the total work done on the baseball by the bat is 36.25 J.

emily ruth's annual premium is $1058.50

step-by-step explanation:

emily ruth is a female of 27 years age purchasing 20 year endowment insurance with face value $25000.

from the given table,

for females, the age of a male 3 years younger should be used.

so, we have to check for 24 year male for 20 year endowment.

it is 42.34 for every $1000 face value.

for a face value of $25000,

it is 25 * 42.34 = $1058.50

∴ emily ruth's annual premium is $1058.50