Question

Мальчик, масса которого 45 кг, взбирается на дерево высотой 10 м. Какую работу при этом совершает мальчик? Принять, что g≈10 мс2=10Нкг. Мальчик совершает работу в скольких джоулях?

Answer 1

Ответ:

А=F×s=>A= mgs=45×10×10=4500 Дж.

Answer 2

Ответ:

Дано: Формула Решение

m=45кг. А=mgh. А=45кг×10м×10Н:кг=4500

h=10м

А=?Дж

Ответ:4500Дж

Answer 3

Calculation of Work Done by the Boy

To calculate the work done by the boy while climbing the tree, we can use the formula:

Work = Force × Distance

In this case, the force can be calculated using the boy's mass and the acceleration due to gravity, which is approximately 10 m/s^2 or 10 N/kg. The distance is the height of the tree, which is given as 10 meters.

Let's calculate the force first:

Force = mass × acceleration due to gravity

Given that the boy's mass is 45 kg and the acceleration due to gravity is 10 N/kg, we can calculate the force:

Force = 45 kg × 10 N/kg = 450 N

Now, we can calculate the work done by the boy:

Work = Force × Distance

Work = 450 N × 10 m = 4500 J

Therefore, the boy does 4500 Joules of work while climbing the tree.