Question

Ящик массой 10 кг стоит в лифте движущемся вниз который поднимается с ускорением 2 метра в секунду направленным вверх. Определить модуль силы тяжести действующий на ящик. Плиз Егэ другу надо.

Answer 1

Если лифт движется вниз, а ускорение направленно вверх, то ускорение отрицательно.. Модуль силы тяжести mg с вектором направлен вниз

Answer 2

Calculation of the gravitational force on the box

To determine the magnitude of the gravitational force acting on the box, we need to consider the mass of the box and the acceleration due to gravity. The formula to calculate the gravitational force is:

F_gravity = m * g

Where: - F_gravity is the gravitational force - m is the mass of the box - g is the acceleration due to gravity

In this case, the mass of the box is given as 10 kg. However, the acceleration due to gravity is not provided in the question. The standard value for the acceleration due to gravity on Earth is approximately 9.8 m/s^2.

Since the lift is moving downward with an acceleration of 2 m/s^2, we need to subtract this acceleration from the acceleration due to gravity to find the net acceleration acting on the box.

Let's calculate the gravitational force on the box using the provided information:

Step 1: Calculate the net acceleration acting on the box: - Acceleration due to gravity (g) = 9.8 m/s^2 - Acceleration of the lift (a_lift) = -2 m/s^2 (negative because it is moving downward) - Net acceleration (a_net) = g - a_lift

Step 2: Calculate the gravitational force: - Mass of the box (m) = 10 kg - Gravitational force (F_gravity) = m * a_net

Now, let's calculate the gravitational force on the box using the above steps:

Step 1: Calculate the net acceleration: - g = 9.8 m/s^2 - a_lift = -2 m/s^2 - a_net = g - a_lift = 9.8 m/s^2 - (-2 m/s^2) = 11.8 m/s^2

Step 2: Calculate the gravitational force: - m = 10 kg - F_gravity = m * a_net = 10 kg * 11.8 m/s^2 = 118 N

Therefore, the magnitude of the gravitational force acting on the box is 118 Newtons.

Please note that the provided search results do not contain relevant information for this specific calculation. The calculation is based on the principles of Newtonian physics and the given information in the question.