David uses a falling mass to split wooden logs. The 5kg mass slides down the rod and hits the metal blade. The force on the blades splits the log.

b) David lifts the mass. The mass gains 50J of gravitational potential energy. The falling mass changes this energy into kinetic energy.

i) As it falls, what is the maximum amount of energy the mass can change from gravitational potential energy to kinetic energy? ____________ J

ii) Not all the gravitational potential energy is transferred to kinetic energy as the mass falls.
Give one reason for this.

Question

17-08-2022
Mathematics

contestada

David uses a falling mass to split wooden logs. The 5kg mass slides down the rod and hits the metal blade. The force on the blades splits the log.

b) David lifts the mass. The mass gains 50J of gravitational potential energy. The falling mass changes this energy into kinetic energy.

i) As it falls, what is the maximum amount of energy the mass can change from gravitational potential energy to kinetic energy? ____________ J

ii) Not all the gravitational potential energy is transferred to kinetic energy as the mass falls.
Give one reason for this.

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ogorwyne ogorwyne · Answer 1 · 2022-08-19T23:24:03+02:00

As David lifts the mass,

the maximum amount of energy the mass can change from gravitational potential energy to kinetic energy is 50 J
The exact reason why we can say that not all energy is converted to kinetic energy is because as the mass falls, there would be air resistance which would slow it down although some would still be gravitational.

What is kinetic energy?

This is the term that is used to refer to the energy that a body has due to the fact that the given body is on motion. The kinetic energy is the energy in motion.

What is the gravitational potential energy?

This is the energy that a body would have due to the fact that it is positioned on a gravitational potential field.