Ronald pushes a box up an inclined plane with 35% efficiency. If 224 joules of energy went into moving the box, how much energy did Ronald put into the inclined plane?(1 point)
Responses
189 joules
189 joules
145.6 joules
145.6 joules
78.4 joules
78.4 joules
640 joules
To find out how much energy Ronald put into the inclined plane, we need to calculate the total energy required to move the box up the inclined plane, and then divide it by the efficiency.
Let E be the energy Ronald put into the inclined plane.
The efficiency is 35%, so only 35% of the energy put into the inclined plane is used to move the box.
Thus, 35% of E is equal to 224 joules.
0.35E = 224
E = 224 / 0.35
E = 640 joules.
Therefore, Ronald put 640 joules of energy into the inclined plane.