how much force must he exert to the lift the loaded bar and overcome the force of gravity
To determine the amount of force required to lift a loaded bar and overcome the force of gravity, you need to know the weight of the loaded bar. The weight of an object is the force due to gravity acting on it and it can be calculated using the formula:
Weight = mass x gravity
Where mass is the mass of the loaded bar and gravity is the acceleration due to gravity (which is approximately 9.8 m/s² on the surface of the Earth).
Once you know the weight of the loaded bar, the force required to lift it and overcome gravity is equal to its weight.
A group of extraterrestrial travel from the moon to earth to train. How to mount force the exert to move change on earth?
The force to move on the earth is less than the force you need to move on the moon
The force would need to be greater, so they would not perform as well
The force would be less so they would perform at a higher level
The force would be the same