It is true. Such forces always come in pairs. (This is related to Conservation of Momentum.) Of course, the effect of such a force on the Earth - the amount Earth accelerates, if you release the grapefruit - will be much less than the effect on the grapefruit (by Newton's Second Law).
The force that an 800N man exerts on the Earth is equal in magnitude but opposite in direction to the force that the Earth exerts on the man, by Newton's third law. So, the force the man exerts on the Earth is 800N.
A Newton (or a Kilonewton) is a measure of FORCE, not of weight. On Earth's surface, a mass of 1 kg exerts a force of approximately 9.8 N [down]
While the ball does exert a force on Earth according to Newton's third law of motion, the force exerted by the ball on Earth is much smaller compared to the force exerted by Earth on the ball due to Earth's much larger mass. This makes the effect of the ball's force on Earth negligible in comparison.
The force exerted by Earth's gravity on a car is equal in size (magnitude) to the force the car exerts on Earth. This is described by Newton's third law of motion, which states that for every action, there is an equal and opposite reaction.
According to Newton's third law, the apple exerts an equal and opposite force on the Earth when it is dropped. This force is equal in magnitude to the force exerted on the apple and causes the Earth to accelerate towards the apple, although this acceleration is extremely small due to the Earth's large mass compared to the apple.
The force that an 800N man exerts on the Earth is equal in magnitude but opposite in direction to the force that the Earth exerts on the man, by Newton's third law. So, the force the man exerts on the Earth is 800N.
The magnitude of the force is exactly the same (Newton's Third Law).
Newton's third law states that for every action, there is an equal and opposite reaction. So, while the Earth exerts a force on an object that is equal to the object's weight, the object exerts an equal force in the opposite direction on Earth. This is why you can feel the ground pushing up on you when you stand on it.
A Newton (or a Kilonewton) is a measure of FORCE, not of weight. On Earth's surface, a mass of 1 kg exerts a force of approximately 9.8 N [down]
While the ball does exert a force on Earth according to Newton's third law of motion, the force exerted by the ball on Earth is much smaller compared to the force exerted by Earth on the ball due to Earth's much larger mass. This makes the effect of the ball's force on Earth negligible in comparison.
True. According to Newton's third law of motion, for every action, there is an equal and opposite reaction. When you push downward on the Earth to make a pole vault, the Earth exerts an equal force upward on the pole.
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.
Yes, the forces between Earth and the Moon follow Newton's third law. The Earth exerts a gravitational force on the Moon, and in return, the Moon exerts an equal but opposite gravitational force on the Earth.
The force exerted by Earth's gravity on a car is equal in size (magnitude) to the force the car exerts on Earth. This is described by Newton's third law of motion, which states that for every action, there is an equal and opposite reaction.
Anything that has mass exerts a gravitational field, so yes, earth exerts one.
According to Newton's third law, the apple exerts an equal and opposite force on the Earth when it is dropped. This force is equal in magnitude to the force exerted on the apple and causes the Earth to accelerate towards the apple, although this acceleration is extremely small due to the Earth's large mass compared to the apple.
No, the force of gravity between the Earth and a 70kg person is the same, according to Newton's third law of motion. The force exerted by the person on the Earth is equal in magnitude to the force exerted by the Earth on the person.