A rock dropped from a car window initially moves forward as the same speed as the car and falls downwards due to gravitational attraction. The forward speed falls off from the air resistance. This rate of speed reduction depends on the mass and density of the rock and the initial air velocity. For simplicity consider the case of dropping the rock in a vacuum (no air), or that the rock is so large that its momentum and inertia reduce the reduction of its forward speed only slightly while the rock is falling.
To the observer in the car w the rock then falls down from the point dropped maintaining its forward speed.
The rock accelerates downward at 32 ft/sec2 until it contacts the road some distance "d" below it. Using the expression:
d = vt + (1/2)at2
where d is distance travelled downward, v is starting downward velocity, a is acceleration of gravity, and t is time. It is possible to calculate "t". It is just as easy to time the fall of the rock by experimentation.
The forward movement of the rock lasts for time "t". It was moving at some forward speed "v". It travels
d = vt . Where d is distance travelled forward, v is starting forward velocity, and t is time.
The rock lands under the hand that dropped it at distance "d" down the road.
A rock that is dropped, and a apple falling from a tree.Hold a ball in your hand, stretch out your arm, and drop the ball. As it is moving towards the ground, it is in free fall.
A rock that is dropped, and a apple falling from a tree.Hold a ball in your hand, stretch out your arm, and drop the ball. As it is moving towards the ground, it is in free fall.
Galleleo was famous for discovering that everything that you drop at the same distance will travel at the same speed, unless the air resistance is different for example dropping a rock and a flat piece of paper, the rock will hit the ground first, but if you drop a rock and and a crincked piece of paper they will fall at the same distance
gravitational potential energy converts gradually to kinetic energy. At the bottom of the hill, when the rock has stopped moving, there will be no gravitational energy or kinetic energy, it will have all been transformed to heat, sound, friction, and maybe some damage to the rock or the ground. (permanent distortion)
-- putting the brakes on, in order to slow the car down; -- lifting the spoilers on the airplane wing, in order to reduce airspeed OR stop on the runway; -- firing rockets forward in the direction the Space Shuttle is moving, in order to reduce velocity and drop out of orbit; -- tossing a rock or a ball straight up in the air; the acceleration of gravity is downward, so the ball slows down and stops, before it starts falling; -- Just before the rock hits the ground, it has some speed. When it hits the ground, it feels a large acceleration UPWARD against its motion, and a split second later, its speed is zero.
A rock that is dropped, and a apple falling from a tree.Hold a ball in your hand, stretch out your arm, and drop the ball. As it is moving towards the ground, it is in free fall.
A rock that is dropped, and a apple falling from a tree.Hold a ball in your hand, stretch out your arm, and drop the ball. As it is moving towards the ground, it is in free fall.
The general theories of Physics say that both rocks will hit the ground at the same time.
Rock flour consists of the remains of once proud rocks, ground to a fine powder by the abrasion and scouring caused by the grinding action of moving, rock embedded glaciers.
A plain. On flat ground, the chance of a rock moving is fairly small. On a hillside, any slight force on the rock will cause it to roll down the hill.
A plain. On flat ground, the chance of a rock moving is fairly small. On a hillside, any slight force on the rock will cause it to roll down the hill.
fire, ground, rock, fire normal, ground normal, rock normal, fire electric, fire ice, fire fighting, fire poison, fire ground, fire flying, fire psychic, fire bug, fire rock, fire ghost, fire dark, fire steel, electric ground, electric rock, ice ground, ice rock, fighting ground, fighting rock, poison ground, poison rock, ground flying, ground psychic, ground bug, ground rock, ground ghost, ground dark, ground steel, flying rock, psychic rock, bug rock, rock flying, rock psychic, rock ghost, rock dark, and rock steel-types are super weak to water.
Motion is measured as relative to a set point.A rock sitting on the ground is at rest in relation to the groundThe rock and the ground are spinning with the surface of the planet.The planet is moving in the solar systemAnd so on
Galleleo was famous for discovering that everything that you drop at the same distance will travel at the same speed, unless the air resistance is different for example dropping a rock and a flat piece of paper, the rock will hit the ground first, but if you drop a rock and and a crincked piece of paper they will fall at the same distance
Rock until You Drop was created in 1981-01.
what type of material is not moving in the rock cycle
Rock 'til You Drop was created on 1991-09-24.