A 1000 kgkg car pushes a 2000 kgkg truck that has a dead battery. When the driver steps on the accelerator, the drive wheels of the car push against the ground with a force of 4500 NN.

Explanation:

A car of mass 1000kg pushes 2000kg

The forward force is 4500N

Then, summation of the forward forces is ma

ΣF = Σ(ma) = m1a1 + m2a2

Since the body are moving together then, they will have the same acceleration(a)

ΣF = Σ(ma) = (m1+m2)a

Let m1=1000kg.

m2=2000kg

F=4500N

Then,

4500=(1000+2000)a

4500=3000a

Then,

a=4500/3000

a=1.5m/s²

answer; equivalent to a one(1) horsepower motor;

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