Question

Найти вес человека масса которого 50 кг в момент начала движения лифта вниз с ускорением 0.6 м/с2

Answer 1

P=ma
P=50*0.6=30 килограмм

Answer 2

Finding the Weight of a Person in an Elevator

To find the weight of a person in an elevator at the moment it starts moving downward with an acceleration of 0.6 m/s^2, we need to consider the forces acting on the person.

When the elevator is at rest or moving at a constant velocity, the weight of the person is equal to their mass multiplied by the acceleration due to gravity (9.8 m/s^2). However, when the elevator accelerates, an additional force is exerted on the person due to the acceleration.

To calculate the weight of the person in this scenario, we can use Newton's second law of motion, which states that the net force acting on an object is equal to the mass of the object multiplied by its acceleration:

Net force = mass × acceleration

In this case, the net force acting on the person is the difference between the force of gravity and the force due to the acceleration of the elevator. The force of gravity is given by the formula:

Force of gravity = mass × acceleration due to gravity

Let's assume the mass of the person is 50 kg. We can calculate the weight of the person in the elevator as follows:

1. Calculate the force of gravity: - Force of gravity = mass × acceleration due to gravity - Force of gravity = 50 kg × 9.8 m/s^2

2. Calculate the force due to the acceleration of the elevator: - Force due to acceleration = mass × acceleration - Force due to acceleration = 50 kg × 0.6 m/s^2

3. Calculate the net force acting on the person: - Net force = Force of gravity - Force due to acceleration

4. Calculate the weight of the person in the elevator: - Weight = mass × acceleration due to gravity - net force

Now, let's calculate the weight of the person in the elevator:

1. Calculate the force of gravity: - Force of gravity = 50 kg × 9.8 m/s^2 = 490 N

2. Calculate the force due to the acceleration of the elevator: - Force due to acceleration = 50 kg × 0.6 m/s^2 = 30 N

3. Calculate the net force acting on the person: - Net force = Force of gravity - Force due to acceleration - Net force = 490 N - 30 N = 460 N

4. Calculate the weight of the person in the elevator: - Weight = mass × acceleration due to gravity - net force - Weight = 50 kg × 9.8 m/s^2 - 460 N

Therefore, the weight of the person in the elevator at the moment it starts moving downward with an acceleration of 0.6 m/s^2 is (50 kg × 9.8 m/s^2) - 460 N.

Please note that the weight of an object can vary depending on the acceleration of the elevator.