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3 years ago

According to Newton's second law of motion what is force equal to

2 answers:

8 0

Newton's second law of motion can be formally stated as follows: The acceleration of an object as produced by a net force is directly proportional to the magnitude of the net force, in the same direction as the netforce, and inversely proportional to the mass of the object

IrinaVladis [17]3 years ago

6 0

Explanation:

According to Newton's second law of motion, the force is equal to the product of mass and acceleration of the object. Mathematically, it is given by :

$F=m\times a$

It is also defined as the rate of change of linear momentum is directly proportional to the applied external force i.e.

$F=\dfrac{dp}{dt}$

If the momentum of the system is constant, the net force acting on it is equal to 0. Hence, this is the required solution.

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How to solve for resistors

valentinak56 [21]

9514 1404 393

Answer:

A1 = 3A, A2 = 1.5A

Effective resistance = 2Ω

Explanation:

When the switch is closed, the voltage across each resistor is 6V, so the current through it (A2) is ...

A2 = 6V/(4Ω) = 1.5A

There are two parallel paths, each with that current, so the current from the battery is ...

A1 = A2 +A2 = 1.5A +1.5A = 3.0A

Then the effective resistance is ...

Reff = 6V/(3.0A) = 2.0Ω

The solution to the circuit is ...

A1 = 3A, A2 = 1.5A

Effective resistance = 2Ω

6 0

3 years ago

Three objects have velocities that vary with time

Solnce55 [7]

#21

initial velocity=u=5m/s
Time=t=2s
Acceleration=a=1.3m/s²

According to first equation of kinematics

v=u+at
v=5+1.3(2)
v=5+2.6
v=7.6m/s

#22

v1=2+3(3)=2+9=11m/s
v2=-8-4(3)=-20m/s
v3=1-5(3)=-14m/s

The order is

v2<V3<v1

for speed find absolute velocity

S1=|11|=11m/s
S2=|-20|=20m/s
S3=|-14|=14m/s

So order is

S1<S3<S2

7 0

2 years ago

Read 2 more answers

How do you find weight =mass×gravitational acceleration

Artist 52 [7]

That's a formula that shows the relationship between three quantities ...
weight, mass, and acceleration. If you know any two of them, then you
can use this formula to find the one you don't know.

Examples:

==> I have a rock with 2 kilograms of mass.
The gravitational acceleration on Earth is 9.8 m/s² .
How much does my rock weigh on Earth ?

   Weight = (mass) x (grav acceleration)
      = (2 kg) x (9.8 m/s²)
   = 19.6 newtons
      (about 4.41 pounds)

==> My brother weighs 770 newtons (about 173 pounds) on Earth.
   What is his mass ?

       Weight = (mass) x (grav acceleration)

   770 newtons = (mass) x (9.8 m/s²)
Divide each side
by 9.8 m/s²:    770 newtons / 9.8 m/s² = mass

    78.57 kilograms = mass

==> When I went to the Moon, I took along my 2-kilogram rock.
   I weighed my rock on the Moon.
   It weighs 3.25 newtons (about 0.73 pound) there.
   What is the gravitational acceleration on the Moon ?

   Weight = (mass) x (grav acceleration)

   3.25 newtons = (2 kg) x (acceleration)

Divide each side
by 2 kilograms: (3.25 newtons)/(2 kg) = acceleration

    1.63 m/s² = grav acceleration on the Moon

7 0

3 years ago

Read 2 more answers

Your nerf dart gun is able to shoot a suction cup dart at a speed of 5 m/s. Your room is 3 meters across. You want to shoot your

postnew [5]

1,766 m according to my app. see foto.

4 0

4 years ago

When a burning stick of increase is moved fast in a circle a circle of red light is seen.

anzhelika [568]

Answer:

The impression of the image on the retina lasts for about 1/16th of a second after the removal of the object. If a burning stick of incense is revolved at a rate of more than sixteen revolutions per second, we see a circle of red light due to persistence of vision.

Explanation:

7 0

3 years ago