Question

How heavy is a rock if it requires 450 joules of work to lift it 4 meters?​

Answer 1

Use the formula: F=P=10m and A=Fs. The answer is 11.25 (kg)

Step-by-step explanation:

A=450(J), s=4(m). Use the formula: A=Fs we will have 450=4F

=> F=450:4= 112.5 (N)

Now use the formula: F=P=10m => 112.5=10m => m=112.5:10=11.25(kg)