12 A refrigerator can be lifted a distance of h using two methods One method, (2) called "lift involves lifting the refrigerator vertically using a forklift The other
method, called "push"Involves pushing the refrigerator up a ramp
Lift
Push
Ignore friction between the refrigerator and the ramp If the refrigerator is moved at
the same constant speed during both motions, which of the following statements are
true?
B
Less applied force is exerted on the refngerator during the "push
The refrigerator gains more mechanical energy during the lift"
More work is done on the refrigerator by the applied force during the
push
The refrigerator gains more mechanical energy during the "push
D

neither accurate nor precise.

dec 23, 2016 - a load of bricks weighing 680 n a distance of 10 m across a parking lot. if if the worker pushes the cart with a constant force of 209 n, what work= force x distance = 220 n x 10 m = 2200 n.m = 2200 j i don't know where the person got it from, but the initial part, work= force x distance me.

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.