Calculate the mechanical advantage of a ramp if the box you are trying to move has a mass of 10 kilograms, the board is 15 feet long and the height of the ramp is 5 feet .

3
300
150
45

Assume this car is driven off a cliff . how many arrows of force need to be drawn in the free body diagram? assume no air resistance -five -one -three -four

What is the equation for electrical work?

Would it be correct to say the doppler effect is the apparent change in the speed of a wave due to the motion of the source? be sure to fully explain your position using at least 3 complete content related sentences.