It takes a truck 3.56 seconds to slow down from 112 km/h. what is its average acceleration

Complete question is

It takes a truck 3.56 seconds to slow down from 112 km/h to 87.4 km/h. What is its average acceleration?

To convert km/h into m/s multiply by 5/18

Initial velocity =u=112 km/h=112*5/18 m/s = 31.1 m/s

Final velocity=v=87.4 km/h= 24.2 m/s

Time=3.56 secs

Average acceleration = change in velocity/time

==

=

=1.94 m/s²

answer: option c. i.e. electric current flowing “downhill” from the negative electrode to the positive electrode in a battery

explanation:

the water analogy to the circuits define the pipes (water flows) to the electric current. now, we know that the electric current flows from the positive terminal to the circuit (as shown in the diagram attached).

hence, option c is the correct answer.