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Anastaziya [24]
3 years ago
5

What net force is needed to increase the velocity of a 5 kg object by 3 m/s over the course of 2.5 seconds?

Physics
2 answers:
trasher [3.6K]3 years ago
7 0

Answer:

\boxed {\boxed {\sf 6 \ Newtons}}

Explanation:

According to Newton's Second Law of Motion, force is the product of mass and acceleration. The mass of the object is 5 kilograms, but the acceleration is unknown.

We can find acceleration using the following formula:

a= \frac{ \Delta v}{t}

The velocity of the object increases by 3 meters per second. It accelerates in 2.5 seconds.

  • Δv= 3 m/s
  • t= 2.5 s

Substitute the values into the formula.

a= \frac{3 \ m/s}{2.5 \ s}

a= 1.2  \ m/s/s = 1.2 \ m/s^2

Now we know the mass and acceleration.

  • m= 5 kg
  • a= 1.2 m/s²

Substitute the values into the force formula.

F=ma

F= (5 \ kg)(1.2 \ m/s^2)

F= 6 \ kg*m/s^2

Convert the units. 1 kilogram meter per second squared is equal to 1 Newton. Our answer of 6 kilogram meters per second squared is equal to 6 Newtons.

F= 6 \ N

mixer [17]3 years ago
6 0

Hi there!

Recall Newton's Second Law:

\large\boxed{\Sigma F = ma}

∑F = net force (N)

m = mass (kg)

a = acceleration (m/s²)

We must begin by solving for the acceleration using the following:

a = Δv/t

In this instance:

Δv = 3 m/s

t = 2.5 sec

a = 3/2.5 = 1.2 m/s²

Now, plug this value along with the mass into the equation for net force:

\Sigma F = 5(1.2) = \boxed{6 N}}

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Determine la inercia rotacional de una varilla de 4 m de largo y 2 Kg de mesa si su eje de rotación esta situado a la mitad de l
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Answer:

   I = 2.667 kg m²

Explanation:

The moment of inertia of a body can be calculated by the expression

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