Question

Тело массой m =1,0 кг, брошенное с земли под некоторым углом к горизонту, упало на расстоянии L= 80 см от места бросания. Изменение его импульса за все время полета p = 4,0 кгм/с. Найдите угол, который составляла его скорость с горизонтом в начальный момент (в градусах).ПОМОГИТЕ!!! СРОЧНО!!!Кто даст правильное решение, тому пополню телефон на 500 руб.

Answer 1

Arcsin0,3125 =18,2
Решение и тп в лс

Answer 2

Problem Analysis

We are given the following information: - The mass of the body, m, is 1.0 kg. - The body is thrown from the ground at an angle to the horizon. - The body falls at a distance L of 80 cm from the point of throwing. - The change in momentum of the body during the entire flight is p = 4.0 kgm/s. - We need to find the angle at which the velocity of the body makes with the horizon at the initial moment.

To solve this problem, we can use the principles of projectile motion and conservation of momentum.

Solution

Let's break down the problem into steps:

Step 1: Find the initial velocity of the body. - We know that the change in momentum is given by the formula p = m * Δv, where m is the mass of the body and Δv is the change in velocity. - In this case, the change in momentum is given as p = 4.0 kgm/s. - Therefore, Δv = p / m = 4.0 kgm/s / 1.0 kg = 4.0 m/s.

Step 2: Find the horizontal and vertical components of the initial velocity. - Let's assume the initial velocity of the body is v0 and the angle it makes with the horizon is θ. - The horizontal component of the initial velocity, v0x, is given by v0x = v0 * cos(θ). - The vertical component of the initial velocity, v0y, is given by v0y = v0 * sin(θ).

Step 3: Find the time of flight. - The time of flight, t, can be calculated using the formula t = 2 * (v0y / g), where g is the acceleration due to gravity. - Since the body is thrown from the ground, the initial vertical velocity is v0y = 0. - Therefore, the time of flight, t, is given by t = 2 * (0 / g) = 0.

Step 4: Find the horizontal distance traveled. - The horizontal distance traveled, R, can be calculated using the formula R = v0x * t. - Since the time of flight, t, is 0, the horizontal distance traveled is also 0.

Step 5: Find the angle θ. - The angle θ can be found using the formula tan(θ) = L / R, where L is the distance fallen and R is the horizontal distance traveled. - Since R is 0, the angle θ is undefined.

Answer

Based on the given information, it is not possible to determine the angle at which the velocity of the body makes with the horizon at the initial moment. The horizontal distance traveled is 0, and therefore, the angle θ is undefined.