1. 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?
-
vr
what is it’s average acceleration ?

The average acceleration, aₐ = 6 m/s²

Explanation:

Given that,

The initial speed of the roller coaster car, u = 4 m/s

The final speed of the roller coaster car, v = 22 m/s

The time taken to attain the final speed is, t = 3 s

The average acceleration is defined as the change in the final velocity to initial velocity by time.

                                        aₐ  = v - u / t         m/s²

Substituting the values in the above equation,

                                         aₐ = 22 m/s - 4 m/s  /   3 s

                                              = 6 m/s²

Hence, the average acceleration of the roller coaster is aₐ = 6 m/s²

hello, i am papaguy.

i have found an answer to your question but use it as information.

information: because weak acids/bases have low concentration of hydrogen ions, the addition of water has a large impact on the ph. 2. a difference in 1 unit is a 10x difference in concentration for example; a liquid with ph of 3 is 10x more acidic than a liquid with a ph of 4. therefore, a liquid with a ph of 3 is stronger.

best of luck!

the speed of the cart after 3 seconds of low fan speed is ⇒ 54.0 cm/s.

the speed of the cart after 5 seconds of medium fan speed is ⇒ 120.0 cm/s.

the speed of the cart after 2 seconds of high fan speed is ⇒ 64.0 cm/s. 

just did the lab.