When you stand on Earth, your feet push against it with a force equal to your weight. Why doesn’t Earth accelerate away from you?

Q: Suppose you stood on top of a ladder that was so tall that you were four times as far from Earth's…

A: Given value: The distance r from the center is given as = four times of earth's radius Re

Q: If your mass remained the same while the mass of Earth doubled while staying the same size, your…

A: Mass is quantity of matter . It remains constant. It doesn’t depend on mass of Earth.But weight of…

Q: Which of the following statements about free fall acceleration on Earth is accurate?

A: Answer            It is constant value of 9.81m/s^2

Q: What would happen to the gravitational force felt between two planets if the mass of one planet were…

A: Given data: The mass of one planet doubled (m1)' = 2m1 Required: The new gravitational force

Q: The “weightlessness” of an astronauts in space means Choose answer 1) stronger than that of the…

A: Here the correct option is (3). i .e.  as the same strong as that of the baseball

Q: Two astronauts weighing 80 kg each are in a weightless condition in space. If they are separated by…

A: The gravitational force of attraction is inversely proportional to distance. Mathematically it is…

Q: Calculate the force of gravitation between two bodies weighing 50 kg and 10 kg kept at a distance 5…

A: Using Newton's law of gravitation  F = GMm/d2 F = 6.67 × 10-11× 50×10/(5)2 F = 1.334 × 10-9 Newton

Q: How come in free fall you feel weightless even though gravity is pulling down on you (disregarding…

A: Explanation- Since, gravity acts on any object towards the center of the earth. it means on the…

Q: What did Newton discover about gravity?

A: Newton observed that any object having mass falls towards the Earth if set free at some altitude.…

Q: Two astronauts in an orbiting space station "play catch" (throw a ball back and forth to each…

A: The term "weightless" implies, there is no gravitational force acting on the object (i.e., the ball…

Q: Consider two balls are the same size but different masses like a bowling bowl and a beach ball which…

A: Force= mass x acceleration

Q: Another friend says that the Moon’s gravity would prevent rocks dropping from the Moon to Earth, but…

A: Since the distance between the Moon and the Earth is very large, thus, the Earth’s gravitational…

Q: If the mass of the sun was to increase two-fold, what is the effect of this to the gravitational…

A: Mass of earth, mE=6×1024 kgMass of Sun, MS=2×1030 kgDistance between sun and earth, r=1.5×1011 m

Q: An object weighs 100 N on the lunar surface, what will its weight be on the surface of Mars?

A:

Q: What is the difference between centripetal acceleration and centrifugal force?

A: For an object moving in a circular path, even the speed is constant, it will experience acceleration…

Q: Imagine the distance between the Earth and the Sun suddenly decreased by 4 times. Would the force of…

A:

Q: suppose you go from the earth to a planet where the acceleration of the gravity is 2.5m/s2 , on the…

A: The weight the person on the Earth is

Q: Suppose you stood atop a ladder so tall that you were to times as far from Earth's center as you…

A:

Q: Earth pulls down on you with a gravitational force that you call your weight. Do you pull up on…

A: According to the Newton’s third law, that is every action has equal and opposite reaction.

Q: ut experiences weightlessness in

A: An astronaut experiences weightlessness in deep outer space

Q: Can your weight change depending on where you are standing on the earth?

A: Weight is defined as the product of mass and the acceleration due to gravity.

Q: To begin your wingsuit flight, you step off the edge of a high cliff. Why are you then momentarily…

A:

Q: What happens to the gravitational force of attraction between two objects if you triple the distance…

A: Gravitational force of attraction between two objects is directly proportional to masses of both…

Q: What is NEWTON’S LAW OF GRAVITATION?

A: Newton’s law of gravitation: According to the Newton, in the universe two object attracts each other…

Q: How is the Law of Universal Gravitation used to solve Physics word problems?

A:

Q: If two objects 10 meters apart exert a gravitational force on each other, how far apart do you move…

A:

Q: If Earth shrank with no change in its mass, what would happen to your weight at the surface?

A:

Q: An astronaut lands on a planet that has same mass as Earth but twice the diameter. How does…

A:

Q: Write down NEWTON’S LAW OF GRAVITATION?

A:

Q: The force of gravity on a 6-kg mass is O twice as strong as the force of gravity on a 3-kg mass half…

A: Force due to gravity on a body is given by F = mg, where m = the mass of the body and g =…

Q: do the two masses have the same acceleration

A: Acceleration a = Force /mass

Q: How does the force of gravity between two objects change when one of the masses is quadrupled?

A: The Gravitational force between two masses is given by,          F = Gm1m2r2 here           m1 and…

Q: How could an astronaut in a space shuttle 'drop' an object vertically to Earth?

A: if an object has to fall vertically down wards towards the Earth then it must not possess any…

Q: As far as Newton was concerned, what did a falling apple have in common with the moon?

A: According to Newton’s second law,The attraction force between the falling apple and Earth is known…

Q: By how much does the gravitational force that the Earth exerts on you change if you climb a palm…

A: Given data: A person climbs a palm tree.   Providing the man is pulling himself up at constant speed…

Q: if you drop a feather on and a steel hammer at the same moment, they should hit the ground at the…

A: The second equation of motion is  where, s is the distance, u is the initial velocity, t is the…

Q: As a result of dropping different objects and observing how fast they fell, Newton proposed that the…

A: Newton observed that all the objects in earth in free fall accelerate at the same rate. The only…

Q: Does your desk exert any gravitational force on you? why?

A:

Q: According to Newton’s law of universal gravitation, if the distance between two objects is doubled,…

A:

Q: A 75 kg person stands on each of the following planets. Rank order her weight on the three planets,…

A:

Q: Where must an object be placed between the Earth and the Moon in order for there to be no net…

A: The gravitational forces on an object duo to earth and due to the moon are equal.…

Special Relativity

The theory of special relativity discusses how space and time are related to objects traveling along a straight line at a constant speed. Simply stated, as an object reaches the speed of light, its mass becomes infinite and it is unable to move faster than light. This interstellar speed limit has been the topic of much debate in astronomy, and also in science fiction when people consider how to fly over large distances.