質問: 10ms-2] a. 10,000j b. 5,000j c. 100j d. 1,000j
回答: potential energy (p.e) = mass (m) x gravity (g) x height (h) p.e = mgh m = 10kg h = 10m g = 10ms-2 p.e = 10 x 10 x 10 = 1, 000j ans d