If a car is traveling at 15 mph and increases to a speed of 45 mph in 10 seconds, what is the acceleration? A. 30 mph B. 3 mph C. 3 mph/s D. 30 mph/s

The acceleration will be "3 mph/s".

According to the question,

Final velocity,

Initial velocity,

Time,

As we know the formula,

→

By substituting the values, we get

→                      

→                      

→                        

Thus above answer is right.

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grav force prop 1/r squared 2r all squared is 4rsquared 1/4rsquared quartered

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