- #1
Quarlep
- 257
- 4
Homework Statement
There's a person and he ate a hamburger which its 2000 kcal.And he wants to spend this energy . he will be weightlifting and he will lift 45 kg to 2 meters.How many times he can lift it ?
Homework Equations
W=Fx or W=mgh
The Attempt at a Solution
2000 kcal=2000000 cal and 1 cal is 4,2 joule so 2000000 cal is 8400000 joule.Its equal mgh so
8400000=42000x10x2xA which a is how many time. so we get 10.But my teacher says the answer will be 10000.The difference is I change kg to grams but she didnt it. [/B]