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The speed of the ball is negative while the ball falls back toward the earth?
Wiki User
∙ 14y ago
That depends on the reference we take.....If we take the velocity upwards to be +ve than the velocity downwards will be negative and vice versa....
Wiki User
∙ 14y ago
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As a ball falls toward earth the momentum of the ball increases How would you reconcile this observation with the law of conservation of momentum?
The principle of conservation of momentum is not satisfied, since the sum of external forces is not equal to zero, if the ball falls the net force is equal to the weight, makes the ball Vary your speed and therefore their momentum.
Does the mass make a difference to the speed at which something falls to Earth?
no difference..
What is the maximum possible speed of impact upon the surface of the Earth for a faraway body initially at rest that falls to the Earth by virtue of the Earth's gravity only?
The maximum possible speed is 11.2km/s (25,000 mph), which is the Earth's "escape speed."
The speed at which an object falls and the acceleration at which it falls are always the same value?
No. In a vacuum, all objects fall with the same constant acceleration, meaning that their speed constantly increases. Near the surface of the earth, the speed of any falling object increases by 32.2 feet (9.8 meters) per second every second. These numbers represent the "acceleration of gravity" at the earth's surface.
Can a scalar be negative?
Scalars can be negative, and so can a change in a scalar value.Take temperature:You can have a temperature of -10 degrees.If temperature falls from 20 to 5 degress, the change was -15 degree.The negative value of the scalar is a consequence of where you take the "zero" to be.With speed you have to be very careful because speed is the scalar bit of velocity. Velocity with no consideration of direction.
As a ball falls toward earth the momentum of the ball increases How would you reconcile this observation with the law of conservation of momentum?
The principle of conservation of momentum is not satisfied, since the sum of external forces is not equal to zero, if the ball falls the net force is equal to the weight, makes the ball Vary your speed and therefore their momentum.
Does the mass make a difference to the speed at which something falls to Earth?
no difference..
Does the body falling to the earth travel at the same speed from the very beginning of its travel?
No. Its speed keeps increasing as it falls.
What is the maximum possible speed of impact upon the surface of the Earth for a faraway body initially at rest that falls to the Earth by virtue of the Earth's gravity only?
The maximum possible speed is 11.2km/s (25,000 mph), which is the Earth's "escape speed."
Why do the satellites not fall while revolving around the earth?
. The speed of the satellite is adjusted so that it falls to earth at the same rate that the curve of the earth falls away from the satellite. The satellite is perpetually falling, but it never hits the ground!
Why do skydivers reach a top speed?
as a skydiver falls to the earth,there is air friction in the opposite direction to the force of gravity pulling him towards the earth. As he falls to earth he reaches a higher & higher speed up until the point at which the force of friction caused by air (upwards) is the same as or equals the force of gravity (downwards) and he cannot accelerate any further..ie he reaches a top speed
What is the speed of Niagara Falls?
the niagara falls speed is 4543,667656 mph
What is stopping the sun from dragging the earth into the sun?
the earths shape, the earths size, the earths position, and a few other things. Short answer: the Sun is dragging the Earth toward itself, but the Earth's speed causes it to fall around the Sun in an orbit instead. The Sun's gravitational pull is dragging the Earth (and all the other planets) toward itself. The Earth is moving, and it's speed and direction prevent it from falling closer toward the Sun; instead, it falls around the Sun in an orbit, much like a basketball rolling around the rim of a basket. It works something like this: If the Sun's gravity were suddenly gone, the Earth would move in a (more or less) straight line at a right angle to the direction of the Sun. Because the Sun's gravity is pulling on the Earth, it bends the Earth's velocity vector (direction of movement) in toward the Sun, in the same way a ball thrown straight and level will start to curve toward the ground. As the Earth keeps moving at right angles to the Sun, the Sun's gravity continues to bend the direction of the Earth's movement around itself. The The Earth's speed is such that it continues to fall around the Sun in a (more or less) stable, continuing orbit, like a ball being spun at the end of a string.
What is the loud whizzing stones?
A loud whizzing stone may be referring to the sound a meteor makes when it falls to Earth. A meteor refers to space rocks that are able to break through the Earth's atmosphere and falls from the sky at a rapid speed.
Why dont satellites in orbit fall to the ground like a ball in orbit?
They're given enough tangential velocity ('sideways' speed, parallel to the earth's surface) so that the curve of the earth falls away just as fast as the satellite falls.
The speed at which an object falls and the acceleration at which it falls are always the same value?
No. In a vacuum, all objects fall with the same constant acceleration, meaning that their speed constantly increases. Near the surface of the earth, the speed of any falling object increases by 32.2 feet (9.8 meters) per second every second. These numbers represent the "acceleration of gravity" at the earth's surface.
Can a scalar be negative?
Scalars can be negative, and so can a change in a scalar value.Take temperature:You can have a temperature of -10 degrees.If temperature falls from 20 to 5 degress, the change was -15 degree.The negative value of the scalar is a consequence of where you take the "zero" to be.With speed you have to be very careful because speed is the scalar bit of velocity. Velocity with no consideration of direction.
