A weightlifter raises a bar of mass 50KG until it is above his head - a total height gain of 2.2m.
How much gravitational potential energy has it gained?
I know that GPE is equal to the weight (N) * Height difference so this = 1100J
How much work must he do to hold it there for 5 seconds?
How do I work out?
How much gravitational potential energy has it gained?
I know that GPE is equal to the weight (N) * Height difference so this = 1100J
How much work must he do to hold it there for 5 seconds?
How do I work out?