If a tennis player's arm muscles are weak and unable to produce enough force with one hand to accelerate the ball sufficiently, he can create more total force by hitting with two hands. Which of the following principles best describes why this occurs?

a. Newton's law of action-reaction
b. An object will gain more momentum if more force is applied to it across a period of time.
c. Newton's law of inertia
d. Newton's law of acceleration

Newton's law of inertia

Explanation:

This states that, a body will continue to be at rest or moving at a constant speed in a straight line, unless it is acted upon by a force.

The force could be internal or external.

Since the player's one hand can't produce the desired effect on the tennis ball and his two hands can produce more force to put the tennis ball in motion, then the law of inertia is being obeyed here.

d₁ = displacement of tern from arctic to antarctic = 11000 miles

d₂ = displacement of tern from antarctic to arctic =   - 11000 miles

d = total displacement for the journey

total displacement for the journey is given as

d = d₁ + d₂

d = 11000 + (-11000)

d = 0 miles

t₁ = time of travel from arctic to antarctic = 3 months = 3 x 30 days = 90 days

t₂ = time of travel from antarctic to arctic = 3 months = 3 x 30 days = 90 days

t = total time of travel

total time of travel is given as

t = t₁ + t₂

t = 90 + 90

t = 180 days

average velocity is given as

average velocity = total displacement/ total time

v = d/t

v = 0/180

v = 0 miles/day