What are examples of gravity and friction?

Answer 1

-- You slide your mouse to the edge of the desk and lose your grip on it at the

same time. It accelerates toward the center of the Earth until the floor stops it.

-- You kick off your covers during the night, but you stay on your bed anyway.

-- You roll over in bed once too many. You accelerate toward the center of the

Earth until the floor stops you.

-- You accidentally hit a glass of soda with the back of your hand, tipping it so far

that the line between its center of mass and the center of the Earth no longer

passes through the bottom of the glass. At that point, the glass takes over and

continues to tip on its own. Meanwhile, the liquid in it runs out, and accelerates

toward the center of the Earth until the table stops part of it and the floor stops

the rest of it.

-- An airplane throttles its engine back, reducing the thrust acting on it, which

in turn reduces its airspeed and the lift developed by air pouring over its wings.

Whether or not the elevator surface is adjusted to temporarily maintain altitude,

it's a losing effort. Eventually, the aircraft must begin to lose altitude, and must

continue to do so until the ground stops it.

-- As a hilarious prank, several youngsters lug a large rock to the top of the tallest

building in town, roll it out to the edge, and heave it over. The Earth accelerates

toward the center of the rock, until the two meet and they stop moving toward

each other.

-- A weekend duffer hits a mighty drive off the tee of the 2-km par-9 3rd hole at

his neighborhood links. The ball enters a broad parabolic path, gaining altitude

steadily but at an unmistakeably dwindling rate. Eventually, it ceases its climb and

begins to drop, slowly at first, but with the steady growth of a burgeoning vertical

component of velocity, accelerating toward the center of the Earth until either the

sand or the water stop it.

-- What goes up must come down.

Answer 2

-- the act of walking

-- the act of sitting in a chair

-- the convenient presence of air around us at all times

-- the helpful behavior of water from the tap while we wash hands or dishes

-- our bicycles remaining on the ground as we ride

-- coasting downhill, gaining speed, without pedaling

-- not losing your Golf ball to outer space after a drive off the tee, or the hardball after a homer

-- the act of drinking beer or soda from the bottle

-- the stable orbit in which the Earth circuits the Sun

Answer 3

shooting a Basketball in the net

apple falling from a tree

jumping from a building

Answer 4

For example, the Sun attracts the Earth, keeping it in orbit. Example 2: The Earth attracts us, keeping us on it.

Answer 5

if you drop a light bulb on the floor and it breaks that is because of force of gravity

Answer 6

Friction: Your car tires against the ground Gravity: An apple falling from a tree on to you head