Question

Тело начало движением под действием силы 4 Н. Через 5 с оно приобрело скорость 4 м/с. Определите массу тела

Answer 1

Ответ:

5

Объяснение:

a=v/t=4:5=0,8

F=ma

m=F/a=4:0,8=5

Answer 2

Calculation of Mass

To determine the mass of an object, we can use Newton's second law of motion, which states that the force acting on an object is equal to the mass of the object multiplied by its acceleration. In this case, we have the force and the acceleration, so we can rearrange the equation to solve for mass.

Given: - Force (F) = 4 N - Initial velocity (u) = 0 m/s - Final velocity (v) = 4 m/s - Time (t) = 5 s

We can use the equation:

F = m * a

where: - F is the force - m is the mass - a is the acceleration

Since the object starts from rest, the initial velocity (u) is 0 m/s. Therefore, the acceleration (a) can be calculated using the equation:

a = (v - u) / t

Substituting the given values:

a = (4 m/s - 0 m/s) / 5 s = 0.8 m/s^2

Now, we can substitute the calculated acceleration into the equation for force:

4 N = m * 0.8 m/s^2

Solving for mass (m):

m = 4 N / 0.8 m/s^2 = 5 kg

Therefore, the mass of the object is 5 kg.