Ateacher uses the model that little invisible gremlins speed up or slow down objects and the direction they push gives the direction of acceleration. this is most similar to

Newton's second law.

Explanation: The rate of change of the velocity is called "acceleration"

The acceleration is defined by the second Newton's law, that says that the force applied on an object is equal to the mass of the aboject multiplied by the acceleration of the object:

F = m*a

Where the acceleration points in the same direction than the force applied.

So the model of the gremmlins is explaining this law.

answer: good job it's all correct !

explanation:

when a device is used in a circuit in which the voltage is 81 v, the current flowing through the device is 3 a. what is the resistance of the device?

a. 27 ω

b. 40.5 a

c. 243 ω

d. 243 a

the correct answer is a. 27