The kg is a measure of mass, not force. Weight is a force. So a "weight of 100kg" is scientifically incorrect. It is used in everyday speech to stand for "the force exerted by gravity at the Earth's surface on a 100kg mass", but in scientific terms that's (approximately) 1000 Newtons. Likewise, the force required to accelerate a 100kg mass at 10m/s2 in a weightless environment is 1000 N.raeshun said:I am having trouble understanding g-force.So if a object with a mass of 100 kg is sitting on a platform in space.If the platform was accelerating at 10 m/s^2 upwards would the weight of the object be 1000 kg? If so why?
CWatters said:The force on the platform would be
F=ma
=100kg x 10m/s2
=1000 Newtons (not Kg)
On Earth the force on the ground would be
F=mg
=100kg x 9.8m/s2
=980 Newtons.
About the same. So if this 100kg mass on the platform was a man he would feel roughly the same as he does on Earth (eg 1g).
To be precise he would be experiencing 10/9.8 = 1.02g
haruspex said:The kg is a measure of mass, not force. Weight is a force. So a "weight of 100kg" is scientifically incorrect. It is used in everyday speech to stand for "the force exerted by gravity at the Earth's surface on a 100kg mass", but in scientific terms that's (approximately) 1000 Newtons. Likewise, the force required to accelerate a 100kg mass at 10m/s2 in a weightless environment is 1000 N.
raeshun said:So if this happened on Earth ignoring air resistance would the person on the platform feel weightless?
If by "this" you mean the platform accelerating upwards at 10m/s2, they would feel a force of about 2g: 1g to stay put plus another to accelerate upwards.raeshun said:So if this happened on Earth ignoring air resistance would the person on the platform feel weightless?