Yes.
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Two astronauts floating weightlessly towards each other inside the Space Station, for instance. If one astronaut pushes the other away, both astronauts will move away from each other. Only if the one pushing had his or hers feet firmly against the side of the Station, would only one be pushed away.
An astronaut has to exert a force on a weightless object in order to move it because in space, there is no gravity to naturally pull or push objects. Therefore, the astronaut must apply force to overcome inertia and move the object.
Yes, it is true that a magnet is an object that can exert force on another material. However, it will only exert that force if it is made out of the correct material. Items made of iron are the most common magnetic objects.
The force that moving charged particles exert on one another is called the electromagnetic force. This force is responsible for the interaction between charged particles such as electrons and protons.
When the gravitational force is 0.
The objects with bigger masses exert more pulling force. However, even though all the matter around us exert a force, their masses are too small for them to exert a 'feelable' force. But yes, they do exert a force, but its negligible.
The person in space exerts a force of 850 N on the earth. The fact that the person is weightless has no bearing on this question. Ever since Newton enunciated his three laws of motion we have known that action and reaction are equal and opposite. If the earth pulls him with 850 N, then he pulls the earth with 850 n.
The force you exert towards yourself is called self-force or self-interaction force.
The force you exert on a sponge when you squeeze it is called compression force.
The force that you exert on a lever can be called the effort force. The lever has three parts. They are: the fulcrum, the load, and the effort force. This can also be classified as the input force. The force that you exert to perform a task is known as the input force.
Weightless
You have another force that balances the force of gravity. Your lungs are full of air, which is less dense than water. When in the water, the lungs cause an up-ward, buoyant force which counter-act the force of gravity.
Muscle tissue shortens to exert force. Muscle cells contain special proteins that slide past one another to produce a contraction, which results in the overall shortening of the muscle tissue and generates force.