The cork in Question 1 travels I foot in moving from its lowest position to its highest position. What is the average velocity of the cork during this motion?

8ft/s

Explanation:

For computing the average velocity of the cork first we have to determine the frequency which is shown below:

= 4 Hz

Now the average velocity of the cork is

= 8ft/s

We simply applied the above formulas to determine the frequency and the velocity of the cork during this motion and the same is to be considered

weight of the box is given as

here this is placed on the inclined of angle 42 degree

now this weight will have two components one is along the incline other is perpendicular to it

so here we need to apply a force parallel to incline opposite to its component of weight

so here the component of weight is given as

here we have

so it requires 75 n force to move it upwards