A child makes a ramp to push his toy truck up to his sandbox. If he uses 16 N of force to push the 64 N truck up the ramp, what is the mechanical advantage of his ramp? If your
answer is a decimal, round to the nearest whole number.

found in the nucleus

has mass of one amu

they should be similar or the same

air exerts forces on falling objects near earth’s surface.

explanation:

the term 'free falls' refer to object that are falling towards the earth, in a situation in which gravity is the only force acting on the object.

for an object in free fall, the acceleration is constant (g, the gravitational acceleration), and so the velocity of the object constantly increases.

for objects near earth's surface, there is always another force acting on the object: the resistance due to the air. this force is opposed to the direction of fall of the object, and it is proportional to the velocity of the object, so as the object falls down, this force increases up to a point when it balances the force of gravity, and the object continues its motion at constant velocity (called terminal velocity). since in this case gravity is not the only force acting on the object, we are not in a situation of free fall.