A skateboarder traveling at 7.0 meters per second rolls to a stop at the top of a ramp in 3.0 seconds. What is the skateboarder's acceleration? acceleration=[acceleration]m/s2

The skateboarder's acceleration is -2.33 m/s².

Explanation:

The acceleration of an object is a magnitude that indicates how the speed of the object changes in a unit of time. That is, acceleration is the change in speed in a unit of time.

Acceleration is calculated as the relationship between the variation or change in the speed of a mobile and the time used for said change:

In this case:

Replacing:

and solving you get:

acceleration= -2.33 m/s²

The skateboarder's acceleration is -2.33 m/s².

c. because step up transformer steps up the input voltage i.e increases the input voltage  

the number of turns are greater on the secondary side of step up transformer  

transformer does not handle dc current

a is the answer to this question

explanation: