An experiment was performed on a 2-kg block. forces of 5, 10 and 15 newtons respectively were applied to the block for 5 seconds. describe the difference in final speed between the three trials.

From Newton's second law of motion, force is the product of mass and acceleration. In turn, acceleration is obtained by dividing the velocity by time. That is,
                                          F = ma = mv/t
We can say that force is directly proportional to velocity such that an increase in force will increase the velocity. Thus, the final speed of 15 Newtons will be the greatest among the forces. 

Efficiency is an action of doing something. for example when you take a test. good efficiency means you did well but bad effeciency or no effiency means you did bad.

Electoral current force mechanical advantage if the wheel and axle is 2 n and the output force is 20 n