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deff fn [24]
3 years ago
12

A force of 20 n acts upon a 5 kg block, calculate acceleration of the object

Physics
2 answers:
marshall27 [118]3 years ago
4 0
1. Newton's Second Law tells us how to calculate the acceleration if we know the force and the mass.
  F = m a
We are interested in determining the acceleration, so we divide both sides of the equation by m to get F / m = a a = (20 N) / (5 kg) a = 4 N / kg = 4 (kg m /s2 ) / kg = 4 m / s 2
vitfil [10]3 years ago
3 0

Answer:

the acceleration is:4m/s^2

Explanation:

We have information about the force acting on an object and the mass of that object:

F=20N

and

m=5kg

Given these data, we can use Newton's second law:

F=ma

Where F is the force acting on the object, m is the mass of the object and a is the acceleration.

Since we need a we clear for it in the equation:

a=\frac{F}{m}

And finally, we replace the values we already know:

a=\frac{20N}{5kg} =4m/s^2

The acceleration of the object is 4m/s^2

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Answer: 1.d) The acceleration of an object is always less than the acceleration due to gravity, g (9.81m/s^-2)

2.a)acceleration decreases

Explanation:

Newton's second law:

Newton's second law states that the acceleration of an object is defined by two variables which is the total force acting on the object and the mass of that object. The acceleration is directly proportional to the net force that is applied on an object and inversely proportional to the mass of that object.

When the force applied on an object is increased so does the acceleration of an object however if the mass increase the acceleration decreases.

This can be felt when you look at the truck which usually carry heavy loads they seem to drive slow due to the load hence their acceleration is decreased by the mass that these truck carry .

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3 years ago
The football team is selling mulch as a fundraiser. Which two options are
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A car traveling on a straight road at 15.0 meters per second accelerates uniformly to a speed of 21.0 meters per second in 12.0
oksano4ka [1.4K]
<h2>Option 3,  216 m is the correct answer.</h2>

Explanation:

We have initial velocity, u = 15 m/s

Time, t = 12 seconds

Final velocity, v = 21 m/s

We have equation of motion v = u + at

Substituting

                     21 = 15 + a x 12

                       a = 0.5 m/s²

Now we have equation of motion v² = u² + 2as

                           21² = 15² + 2 x 0.5 x s

                            s = 216 m

       Displacement = 216 m

Option 3,  216 m is the correct answer.

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Consider a particle with unit charge q, and mass m, in a constant magnetic field B directed along the positive z–axis. The parti
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Answer:

it must be helical motion in which the charge particle will move uniformly along z axis and simultaneously it will move in circular path in xy plane.

Explanation:

Magnetic field is along z axis while velocity is in x-z plane

so we will have

F = q(\vec v \times \vec B)

so here we can say

F = q(u\hat i + w\hat k) \times (B \hat k)

so we will have

F = quB(-\hat j)

so here the net force on the charge is perpendicular to its x directional velocity along - Y direction

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Which of the following are possible causes of mass extinctions that scientists have identified
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Answer:

over harvesting, pollution, introduction of invasive species such as new predators and food competitors

Explanation:

The main cause of mass extinction is Humans cause extinction of a species through overharvesting. The second main  cause is pollution ., introduction of invasive species such as new predators and food competitors, habitat destruction, overhunting and other influences. Another very important cause of mass extinction is the unsustainable human population growth.

The five mass extinction events are

Ordovician Mass Extinction

Devonian Mass Extinction

 Permian Mass Extinction

Triassic -Jurassic Mass Extinction

and Cretaceous -Tertiary (or the K-T) Mass Extinction.

4 0
4 years ago
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