We\'ve concluded that an astronaut floating in orbit in the ISS is affected by t

Question

We've concluded that an astronaut floating in orbit in the ISS is affected by the Earth's gravity. So the Earth and the astronaut are pulled toward each other by gravity. Which force is stronger, the Earth's gravitational force on the astronaut or the astronaut's gravitational force on the Earth? Select one: O a. It's not possible to tell which force is stronger. O b. The force that the Astronaut exerts on the Earth is much stronger than the force the Earth exerts on the astronaut. O c. Both forces are the same O d. The force of the Earth's gravity on the astronaut must be much stronger than the force of the astronaut on the Earth. Check

Explanation / Answer

Astronauts and space tourists may rhapsodize about feeling weightless during spaceflight, but don't be fooled by the somewhat misleading term "zero-gravity." Every object in space still feels the gravitational pull from other objects, including space travelers who imagine themselves free of Earth's gravitational shackles.

Earth's gravity affects everything at or near the planet's surface. We feel the force of gravity on Earth through our mass, and that force also translates into a downward pull of 9.8 meters per second squared (32 ft/s^2).

That's why astronauts need powerful machines such as the space shuttle's main engines and twin boosters or the Russian Soyuz rockets to travel beyond Earth's immediate gravitational tug.

Astronauts float around in space because there is no gravity in space. Everyone knows that the farther you get from Earth, the less the gravitational force is. Well, astronauts are so far from the Earth that gravity is so small. This is why NASA calls it microgravity.In space, no one can hear you scream.why Because there is no air in space. No air, no sound. No air, no gravity. so the answer is b

If there is a force between all masses, why are you not pulled toward your desk by the desk’s gravity when you walk away from it? Remember that the net force on you determines how your motion changes. The force of gravity between you and the desk is extremely small compared with other forces constantly acting on you, such as friction, the force from your muscles, Earth’s gravity, and the gravitational pull from many other objects. The strength of the gravitational force between two objects depends on two factors, mass and distance. The Mass of the Objects The more mass two objects have, the greater the force of gravity the masses exert on each other. If one of the masses is doubled, the force of gravity between the objects is doubled.

The Distance Between the Objects As distance between the objects increases, the force of gravity decreases. If the distance is doubled, the force of gravity is one-fourth as strong as before.

Gravity on Earth The force of gravity acts on both masses equally, even though the effects on both masses may be very different. Earth’s gravity exerts a downward pull on a dropped coin. Remember that every action force has an equal and opposite reaction force. The coin exerts an equal upward force on Earth. Because the coin has an extremely small mass compared with Earth, the coin can be easily accelerated. Earth’s acceleration due to the force of the coin is far too small to notice because of Earth’s large mass. The acceleration due to Earth’s gravity is called g and is equal to 9.8 m/s2 at Earth’s surface. You can calculate the force of Earth’s gravity on an object at Earth’s surface using the object’s mass and this acceleration. The formula that expresses Newton’s second law is F = ma. If you use g as the acceleration, the formula for calculating the force due to gravity on a mass close to Earth’s surface becomes F = mg

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