Question

Первоклассник собрал портфель для занятий в школе . Какую силу ему необходимо приложить чтобы поднять портфель массой 800г если в нем лежат учебник математика массой 225 г рабочая тетрадь к учебнику матиматика массой 235 г дневник массой 70 г и ручка массой 30 г

Answer 1

$F_T=mg=(m_1+m_2+m_3+m_4+m_5)g\\ F_T=(0,8+0,225+0,235+0,07+0,03)*10=13,6H$

Answer 2

Calculation of the Force Required to Lift the School Bag

To calculate the force required to lift the school bag, we need to consider the total mass of the bag and its contents.

The mass of the bag is given as 800 grams. Additionally, the bag contains a math textbook weighing 225 grams, a math workbook weighing 235 grams, a diary weighing 70 grams, and a pen weighing 30 grams.

To find the total mass of the bag and its contents, we add up the individual masses:

800 grams (bag) + 225 grams (math textbook) + 235 grams (math workbook) + 70 grams (diary) + 30 grams (pen) = 1360 grams

Therefore, the total mass of the bag and its contents is 1360 grams.

To calculate the force required to lift the bag, we can use the equation:

Force = mass x acceleration due to gravity

The acceleration due to gravity is approximately 9.8 m/s^2.

Converting the mass from grams to kilograms:

1360 grams = 1.36 kilograms

Now we can calculate the force:

Force = 1.36 kg x 9.8 m/s^2 = 13.328 Newtons

Therefore, the first-grader would need to apply a force of approximately 13.328 Newtons to lift the school bag with a total mass of 1360 grams.

Please note that the above calculation assumes that the bag is being lifted vertically without any additional factors such as friction or air resistance.