59 Answered Questions for the topic Gravity

04/12/19

Am I attracting Pluto?
My question is simple: as the title says, **am I exerting a force over for example Pluto**, although it is a **very small** force, it is there, right? Or maybe let's go further: **Am I exerting a... more
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04/12/19

Does gravity differ from place to place on Earth?
Does a particular object have the same weight on every part of Earth or does it vary?
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04/12/19

If gravity isn't a force, then why do we learn in school that it is?
I have studied some of Einstein's Theory of General Relativity, and I understand that it states that gravity isn't a force but rather the effects of objects curving space-time. If this is true,... more
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Gravity Math Algebra 2

04/04/19

Gravitational Force
The gravitational force, F, between an object and the earth is inversely proportional to the square of the distance from the object and the center of the earth. If an astronaut weighs 213 pounds on... more
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03/16/19

Why is the Moon considered the major cause of tides, even though it is weaker than the Sun?
You have likely read in books that tides are mainly caused by the Moon. When the Moon is high in the sky, it *pulls* the water on the Earth upward and a high-tide happens. There is some similar... more
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Gravity

08/02/18

Was eintien agree with Newton's gravity
About gravity of Newton  
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05/07/18

A planet is orbiting a star when the star’s gravity suddenly vanishes. The planet thenheads outward along a straight line. Is Kepler’s second law still obeyed?
A planet is orbiting a star when the star’s gravity suddenly vanishes. The planet then obeys Newton’s First law and heads outward along a straight line. Is Kepler’s second law still obeyed? That is... more
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04/19/18

The amount of gravitational potential energy of a Rocket (4U Physics)
2. A 222 kg weather rocket reaches its maximum height 32 km above the Earth's surface. Determine:a)The amount of gravitational potential energy at its maximum height.b) Its speed when it hits the... more
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Gravity Physics Magnitude

04/18/18

Planet X has three....
Planet X has three Earth's mass and twice times Earth's radius. The magnitude of the gravitational field near Planet X's surface is most nearly...  a. 2 m/s^2  b. 7 m/s^2  c. 10m/s^2  d. 20... more
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04/17/18

Finding mass of a star in orbit around a mass
In a certain binary star system, the masses of the two stars are equal. They revolve in a circular orbit around a center of mass midway between them. The orbital speed of each star is 2.8 x 10^5... more
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04/10/18

Concept questions for gravity
Using the force of gravity, centripetal force, and normal force; why does an astronaut on a space station appear to be weightless?
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Gravity

04/09/18

How can an astronaut weigh different amounts when in different locations?
its about gravity and space 
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Gravity

03/01/18

A mass of 1 kg is falling freely. the force of gravity is?
Force of gravity acting on a free falling body of mass 1kg?
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Gravity

01/16/18

If the force of gravity acts on all bodies in proportion of their masses, then why does not a heavy body fall faster than a light body?
This is question of gravity
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11/18/17

Find the acceleration of the books:
A Student moves a box of books with a rope by pulling the rope with a force of 90 N at an angle of 30°.   The books have a mass of 20 kg and a coefficient of friction between the box and floor is... more
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11/16/17

Newton's gravity and weight qs
An astronaut has a mass of 80 kg, but on an unknown planet, the bathroom scale reads 15 kg when the astronaut stands on it. What is the astronaut's weight and the gravitational field strength on... more
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Gravity Time Speed

10/25/17

A man stands before a train. We noticed that after 2seconds the first wagon has passed. How many seconds are needed for the 16th wagon to pass?
A man stands before a train. We noticed that after 2 seconds the first wagon has passed. How many seconds are needed for the 16th wagon to pass? The speed is constant
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Gravity Physics Space

09/11/17

Astronauts on the International Space Station feel weightless because
Their apparent weight is zero.They are above the earth’s atmosphere.The gravity of the earth and the sun are directed opposite each other, so there is no net gravitational force.They are far enough... more
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Gravity

03/11/17

Always store heavier items in lower shelves
Always store heavier items in lower shelves
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Gravity

03/11/17

Always store heavier items in lower shelves
When lifting any items from floor, always bend your back and don’t bend your knees?
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01/17/17

Word Problem (Trigonometry/Calculus)
A cart full of packages weighing 180 pounds is rolling down a ramp 12 feet long at an incline of 25° (the force applied by gravity is equal to the weight of the package). Find the work done by... more
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Gravity

09/18/16

Prove that when a body is sub divided into two equal masses then the gravitational force between the two is maximum.
Gravitational force question  
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Gravity

09/17/16

Time Gravity question of a Ball Thrown in the air
You throw a ball from 2 meters up in the air at a velocity of 16 m/s. How long will it take for the ball to hit the ground?Grav
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05/18/16

Force of gravity? Acceleration?
Mars has a mass of 6.4 × 1023 kg. It has a moon named Phobos with a mass of 1.07 × 1016 kg. a. If their centers are 9400 km apart, what is the force of gravity acting on Phobos?b. If the radius of... more
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Gravity

02/10/16

define universal gravitational constant?
physics  
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