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3 years ago

What is force. what is a net force

Physics

1 answer:

algol133 years ago

8 0

Answer:

The net force is the vector sum of all the forces that act upon an object. That is to say, the net force is the sum of all the forces, taking into account the fact that a force is a vector and two forces of equal magnitude and opposite direction will cancel each other out.

Off google not mine

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What is surface tension

kupik [55]

Answer:

Surface tension is a fundamental property of the surface of liquid. Surface tension is responsible for the curvature of the surfaces of air and liquids. Surface tension is responsible for the ability of some solid objects to “float” on the surface of a liquid.

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<h2>stay safe healthy and happy.</h2>

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3 years ago

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Pairs of magnets are shown in the diagram.

belka [17]

The answer is X. I hope this helped

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4 years ago

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A 3 kg ball rolls at 2m/s does this system favor kinetic energy or potential energy?

MissTica

Answer:

Kinetic energy

Explanation:

Total energy of any system is always conserved.

$E = K +U$

E= Total energy

K = kinetic energy

U = Potential energy

Kinetic energy is the energy acquired by the system due to the virtue of it's motion.

Potential energy is the energy acquired by the system due to the virtue of it's configuration.

Also, Kinetic energy $K = \frac{1}{2} m v^{2}$

$K = \frac{1}{2} \times 3 \times 2^{2}$

$K = 6 J$

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3 years ago

To meet a U.S. Postal Service requirement, employees' footwear must have a coefficient of static friction of 0.5 or more on a sp

Vlada [557]

Answer:

the minimum time interval is 0.77 seconds

Explanation:

given data

coefficient of static friction = 0.5

coefficient of static friction shoes= 0.825

travel s = 2.40 m

to find out

what is the minimum time interval

solution

we know newton 2nd law

force = mass × acceleration

and

force acting on person due to friction

force = coefficient of static friction shoes × mg

so we can say

coefficient of static friction shoes × mg = ma

a = coefficient of static friction shoes × g

and we know g is 9.8 m/s²

distance formula by kinematic relation

distance = ut + 0.5 × at²

here put a value and u is zero because initial speed

2.40 = 0 + 0.5 × coefficient of static friction shoes × g× t²

2.40 = 0.5 × 0.825 × 9.8 × t²

t = 0.77 s

the minimum time interval is 0.77 seconds

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4 years ago

¿Cuál es la energía cinética que ejerce un Transmilenio que pesa 19500 kg vacío que se desplaza a 53 Km/h y cual es su energía c

EastWind [94]

Answer:

english?

Explanation:

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3 years ago