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3 years ago

Can we call centre of gravity centre of weight?

Physics

1 answer:

algol [13]3 years ago

3 0

Answer:

Centre of gravity is a theoretical point in the body where the total weight of the body is thought to be concentrated. In a uniform gravitational field, the centre of gravity is identical to the centre of mass. Yet, the two points do not always coincide.

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Inductive charging is used to wirelessly charge electronic devices ranging from toothbrushes to cell phones. Suppose the base un

statuscvo [17]

The time required (in s) for the magnetic field to decrease to zero from its maximum value is 1.2 x 10⁻⁶ s.

<h3>Faraday's law of electromagnetic induction</h3>

Faraday's first law of electromagnetic induction states, “Whenever a conductor is placed in a varying magnetic field, an electromotive force is induced.

emf = NdФ/dt

emf = NBA/t

where;

N is number of turns of the coil
A is area of the coil
B is magnetic field
t is time

The time required (in s) for the magnetic field to decrease to zero from its maximum value is calculated as follows;

t = NBA/emf

t = (16 x 1.1 x 10⁻³ x 3.75 x 10⁻⁴) / (5.5)

t = 1.2 x 10⁻⁶ s

Thus, the time required (in s) for the magnetic field to decrease to zero from its maximum value is 1.2 x 10⁻⁶ s.

Learn more about magnetic field here: brainly.com/question/7802337

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7 0

2 years ago

The name of the SI unit for force is the<br> Joule<br> Newton<br> Watt

tensa zangetsu [6.8K]

Answer:

Newton

is the answer of si unit of force

7 0

3 years ago

Name the force between the brakes and the wheels that does work to slow down the vehicle when the brakes are applied

Feliz [49]

when brakes are applied then the tyres are stopped by brake- shoe

these brake shoe are rubber grip which hold tight at the rim of tyre

when these brake show hold tight at the rim then it will apply normal force on the tyre

Due to the rough surface of rubber and rim of the tyre these two surface apply force of friction on these two surfaces

Due to this friction force it resist the motion of tyre and due to which tyre will stop.

So the main cause to stop the tyre will be FRICTION force between brake shoe and tyre rim

7 0

4 years ago

Any four difference between velocity and acceleration

pychu [463]

Answer:

https://physicsabout.com/acceleration-and-velcoity/

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3 years ago

Question 3 A woman sitting in a stationary car notices a man cycling past her at 40 km/hr. Five seconds after he passes her car,

Naya [18.7K]

The shortest possible distance in which she catches up with the man is 129.7 m.

The given parameters:

speed of the man, v₁ = 40 km/hr

speed of the woman, v₂ = 70 km/hr

time when the woman started moving, t₁ = 5 seconds

To find:

the shortest distance when she catches up with the man

Convert the given speed in km/h to m/s

3.6 km/h = 1 m/s
40 km/h = 40/3.6 = 11.11 m/s
70 km/h = 70/3.6 = 19.44 m/s

Calculate the distance moved by the man before she started following him.

Distance moved by the man = speed x time

= 11.11 m/s x 5 s

= 55.55 m

Let the time the woman catches up with the man = t

Apply the following simple principle to calculate the time.

The man is moving forward and the woman is moving forward to close the gap between them, thus both speeds are working against each other.

$(v_2-v_1)t = 55.55 \ m$

the difference in the speed is because they are working against each other.

$(19.44 - 11.11)t = 55.55\\\\8.33t = 55.55\\\\t = \frac{55.55}{8.33} \\\\t = 6.67 \ s$

The time when the woman catches up with the man = 6.67 s

The shortest distance at which the woman catches up with the man is calculated as;

Shortest distance = woman's speed x time when she catches up

= 19.44 m/s x 6.67 s

= 129.7 m

Thus, the shortest possible distance in which she catches up with the man is 129.7 m.

Learn more here: https://brainly.in/question/9541933?tbs_match=3

5 0

3 years ago

Can we call centre of gravity centre of weight? ​

Can we call centre of gravity centre of weight?