Question

Определите начальную скорость тела массой 600г, если под действием силы 8Н расстояние 120 см оно достигло скорости 6 м / с, движется прямолинейно.Пожалуйста если получиться то с объяснениями.

Answer 1

Вот держи решение, не забудь написать единицы измерения в расчете. 

Answer 2

Calculation of Initial Velocity

To determine the initial velocity of an object, we can use the equation of motion:

v = u + at

Where: - v is the final velocity - u is the initial velocity - a is the acceleration - t is the time

In this case, the object is moving with a constant force of 8N and reaches a final velocity of 6 m/s after traveling a distance of 120 cm (or 1.2 m). We need to find the initial velocity.

First, let's convert the distance from centimeters to meters: - Distance = 120 cm = 1.2 m

Next, we need to determine the acceleration. Since the object is moving with a constant force, we can use Newton's second law of motion:

F = ma

Where: - F is the force - m is the mass of the object - a is the acceleration

Given that the force is 8N and the mass is 600g (or 0.6 kg), we can calculate the acceleration:

a = F / m = 8N / 0.6 kg

Now, let's substitute the values into the equation of motion:

6 m/s = u + (8N / 0.6 kg) * t

Since the object is moving in a straight line, we can assume that the time taken to reach the final velocity is the same as the time taken to cover the distance. Therefore, we can rewrite the equation as:

6 m/s = u + (8N / 0.6 kg) * (1.2 m / u)

Simplifying the equation, we get:

6 m/s = u + 16.67 Ns/kg

Now, we can solve for the initial velocity (u):

u = 6 m/s - 16.67 Ns/kg

Calculating the value, we find:

u ≈ -10.67 m/s

Therefore, the initial velocity of the object is approximately -10.67 m/s.

Please note that the negative sign indicates that the object is moving in the opposite direction of the force applied.