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3 years ago

What is called frictional force

Physics

2 answers:

baherus [9]3 years ago

3 0

Answer:

Friction, force that resists the sliding or rolling of one solid object over another.

Olenka [21]3 years ago

3 0

Frictional force is the opposing force that is created between two surfaces that try to move in the same direction or that try to move in opposite directions. The main purpose of a frictional force is to create resistance to the motion of one surface over the other surface.

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If two people, mass of 70 kg and 85 kg respectively, approach each other with speeds of 4 m/s and 7 m/s, what is the total momen

Tems11 [23]

Answer:

a. Momentum A = 280 Kgm/s.

b. Momentum B = 595 Kgm/s.

c. Total momentum = 875 Kgm/s.

Explanation:

Let the two people be A and B respectively.

Given the following data;

Mass A = 70kg

Mass B = 85kg

Velocity A = 4m/s

Velocity B = 7m/s

Momentum can be defined as the multiplication (product) of the mass possessed by an object and its velocity. Momentum is considered to be a vector quantity because it has both magnitude and direction.

Mathematically, momentum is given by the formula;

$Momentum = mass * velocity$

a. To find the momentum of A;

$Momentum \; A = 70 * 4$

Momentum A = 280 Kgm/s.

b. To find the momentum of B;

$Momentum \; B = 85 * 7$

Momentum B = 595 Kgm/s.

c. To find the total momentum of the two persons;

$Total \; momentum = Momentum \; A + Momentum \; B$

Substituting into the equation, we have;

$Total momentum = 280 + 595$

Total momentum = 875 Kgm/s.

5 0

3 years ago

Qué tipo de sistema es una caja de leche chocolatada sin abrir? Ana considera que es un sistema aislado y en cambio Martina opin

Mice21 [21]

Answer:

The box contains a finite number of chocolates making it a closed system since this number does not change.

After taking the box and opening it to eat some chocolates it becomes an open system that can exchange chocolates with the medium

Explanation:

In thermodynamics an isolated system is a system in which no heat is exchanged with the medium, a closed system is a system where no particular one is exchanged with the surrounding medium.

In this case, the box can exchange heat since the cardboard walls are not insulating, so it is not an insulated system.

The box contains a finite number of chocolates making it a closed system since this number does not change.

After taking the box and opening it to eat some chocolates it becomes an open system that can exchange chocolates with the medium

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3 years ago

As streams flow through Stone Mountain, layers of sand build up. Over time, the sand particles form a sedimentary rock called sa

Firlakuza [10]

As streams flow through Stone Mountain, layers of sand build up. Over time, the sand particles form a sedimentary rock called sandstone. What causes sandstone to change into metamorphic rock at Stone Mountain? Sandstone experiences intense heat and pressure.

(Correct Answer is above)

Also Mark Brainliest please.

3 0

4 years ago

Read 2 more answers

Find the momentum of a 25 kg object going 4m/s to the right.

Ronch [10]

X=mass × velocity
x=25×4
=100kgm/s

7 0

4 years ago

You are pushing a 20 N object for 3 meters. If you have to push

Ludmilka [50]

Answer:

For the first equation, the work done would be 60 J, but if it is done with 30 N, it would have been 90 J.

Explanation:

it's actually pretty easy one you practice it for some time. W ( work done in joules ) = F ( force put onto the object in newtons ) * D ( distance traveled in meters ).

5 0

3 years ago

What is called frictional force ​

What is called frictional force