If a structure on which an object rests is not capable of sustaining the weight, the object would break through.
If the reaction force is less than the weight of the car, the car's tires would lose traction, making it difficult to maintain control or move forward. This situation could result in the car sliding or possibly losing traction completely and becoming immobile. It could also lead to potential accidents or skidding.
(using squats for the sake of explanation) The lifter exerts an action force on the weight, which is in the opposite direction to gravity. The lifters shoulders also experience the reaction force (from the weight - otherwise, the weight would pass through the lifter or vice versa). The feet of the lift also experience a reaction force, which, combined with the shoulder-reaction force, is equal to the action force (Newton's Third Law). The feet also experience friction on the floor surface in opposite directions (which cancel out, so the lifter is stationary on the ground) :)
If the force of gravity were to disappear suddenly, the mass of the body would remain the same, as mass is a measure of the amount of matter in an object and does not change. However, the weight of the body would become zero, since weight is the force exerted on an object due to gravity.
To lift a 100 pound weight, you would need to apply a force that is equal to or greater than 100 pounds. This is due to Newton's third law of motion, which states that for every action, there is an equal and opposite reaction. So, the force applied must be at least 100 pounds to overcome the force of gravity acting on the weight.
The reading on the scale would remain the same. Weight is a measurement of the gravitational force between you and the Earth, not the atmospheric pressure. Without the atmosphere, the force of gravity would still act on you, keeping your weight constant.
If the reaction force is less than the weight of the car, the car's tires would lose traction, making it difficult to maintain control or move forward. This situation could result in the car sliding or possibly losing traction completely and becoming immobile. It could also lead to potential accidents or skidding.
The object would float in a given liquid.
The details depend on what strange physics you make up, to replace the action-reaction force pairs.
(using squats for the sake of explanation) The lifter exerts an action force on the weight, which is in the opposite direction to gravity. The lifters shoulders also experience the reaction force (from the weight - otherwise, the weight would pass through the lifter or vice versa). The feet of the lift also experience a reaction force, which, combined with the shoulder-reaction force, is equal to the action force (Newton's Third Law). The feet also experience friction on the floor surface in opposite directions (which cancel out, so the lifter is stationary on the ground) :)
(using squats for the sake of explanation) The lifter exerts an action force on the weight, which is in the opposite direction to gravity. The lifters shoulders also experience the reaction force (from the weight - otherwise, the weight would pass through the lifter or vice versa). The feet of the lift also experience a reaction force, which, combined with the shoulder-reaction force, is equal to the action force (Newton's Third Law). The feet also experience friction on the floor surface in opposite directions (which cancel out, so the lifter is stationary on the ground) :)
That would be quite a radical change; many other laws of physics we are accustomed to would then no longer be valid, either.
every thing would weigh half its normal weight
If the force of gravity were to disappear suddenly, the mass of the body would remain the same, as mass is a measure of the amount of matter in an object and does not change. However, the weight of the body would become zero, since weight is the force exerted on an object due to gravity.
If the force of gravity on Earth suddenly grew stronger, your weight would increase because weight is a measure of the force of gravity acting on your mass. Your body would feel heavier and you would find it more difficult to move around.
Nothing would happen to mass, but as weight is technically a force due to gravity, based on mass, the weight would be doubled, but again mass would remain the same.
To lift a 100 pound weight, you would need to apply a force that is equal to or greater than 100 pounds. This is due to Newton's third law of motion, which states that for every action, there is an equal and opposite reaction. So, the force applied must be at least 100 pounds to overcome the force of gravity acting on the weight.
The reading on the scale would remain the same. Weight is a measurement of the gravitational force between you and the Earth, not the atmospheric pressure. Without the atmosphere, the force of gravity would still act on you, keeping your weight constant.