The object moves upward from the bottom of the inclined plane with an initial kinetic energy of 200 joules. When it passes through the m point on the inclined plane, its kinetic energy decreases by 160 joules and its mechanical energy decreases by 64 joules If the object can return to the bottom, the kinetic energy of the object when it reaches the bottom is

The object moves upward from the bottom of the inclined plane with an initial kinetic energy of 200 joules. When it passes through the m point on the inclined plane, its kinetic energy decreases by 160 joules and its mechanical energy decreases by 64 joules If the object can return to the bottom, the kinetic energy of the object when it reaches the bottom is

When reaching point m, the kinetic energy decreases by 160J, the mechanical energy decreases by 64j, and the gravitational potential energy increases by 96j, That is, the object stops at the highest point. The gravitational potential energy is 120 J. the reduction of mechanical energy is 80 J. when the object slides from the highest point to the lowest point, the mechanical energy is reduced by 80 J again. The final kinetic energy is equal to the mechanical energy = 200-80-80 J = 40 J

The object moves upward from the bottom of the inclined plane with an initial kinetic energy of 100 joules. When it passes through a certain point, the kinetic energy decreases by 80 joules, and the mechanical energy decreases by 20 joules

What do you want to ask? The question is not complete! The initial kinetic energy of 100J indicates that the mechanical energy was 100J at the beginning. If the kinetic energy is reduced by 80, the kinetic energy is now "20j", if the mechanical energy is reduced by 20, the mechanical energy is now "80J", and the gravitational potential energy is "60j". What do you want to ask?