A roller coaster car rapidly picks up speed as it rolls down a slope. As it starts down the slope, its speed is 4 m/s. But 3 seconds later, at the bottom of the slope, its speed is 22 m/s. What is its average acceleration? plz, show the equation.

6m/s²

Explanation:

Given parameters:

Initial velocity  = 4m/s

Time  = 3s

Final velocity  = 22m/s

Unknown:

Average acceleration  = ?

Solution:

Acceleration is the rate of change of velocity with time taken.

    Acceleration  =  

Acceleration  =    = 6m/s²

find the surface area of the sphere to the nearest square unit. use a calculator.

a. 254 in.2

b. 64 in.2

c. 127 in.2

d. 1,018 in.2