M=300кг
t=10с
S=40м
F=?

Предыдущий
вопрос Следующий
вопрос

First, we need to calculate the force using the formula:

F = Ma

Where:
F = force
M = mass (300 kg)
a = acceleration

To find acceleration, we can use the equation:

a = Δv / t

Where:
Δv = change in velocity
t = time (10 s)

Given that the final velocity is 0 m/s (since the object comes to a stop) and the initial velocity is unknown, we can calculate the acceleration first. Using the kinematic equation:

Δv = Vf - Vi

Since the object comes to a stop, the final velocity (Vf) is 0 m/s. Therefore:

Δv = 0 - Vi
Δv = -Vi

Now, we substitute the values into the acceleration equation:

a = (-Vi) / t

Since the object comes to a stop, Vi = S / t:

Vi = 40 m / 10 s
Vi = 4 m/s

Now, we can calculate the acceleration:

a = (-4 m/s) / 10 s
a = -0.4 m/s^2

Substitute the values of mass and acceleration into the force equation:

F = 300 kg * (-0.4 m/s^2)
F = -120 N

Therefore, the force exerted on the object is -120 Newtons. The negative sign indicates that the force is acting in the opposite direction to the initial velocity of the object.