2. If, in the previous question, there is a 15 N kinetic frictional force opposing the motion, how much work is
done by the force of friction? Does friction do positive work or negative work on the block? Draw a free-body
diagram to support your answer.

Answer:

The distance it has traveled is 3,050 m and the magnitude of its displacement is 650 m north.

Explanation:

Distance refers to the length between any two points in space, while displacement refers to the distance from a start position to an end position regardless of the path.

In other words, distance refers to how much space an object travels during its movement; is the quantity moved. It is also said to be the sum of the distances traveled. The distance traveled by a mobile is the length of its trajectory and it is a scalar quantity. In this case, the distance is calculated as:

1850 m + 1200 m= 3,050 m

Displacement refers to the distance and direction of the final position from the initial position of an object. The displacement effected is a vector quantity. The vector representing the displacement has its origin in the initial position, its end in the final position, and its module is the distance in a straight line between the initial and final positions. That is, when expressing the displacement it is done in terms of the magnitude with its respective unit of measurement and the direction because the displacement is a vector type quantity. Mathematically, the displacement (Δd) is calculated as:

Δd= df - di

where df is the final position and di is the initial position of the object.

In this case, the displacement is calculated as:

1850 m - 1200 m= 650 m

Since the distance to the north is greater, the direction of travel will be to the north.

The distance it has traveled is 3,050 m and the magnitude of its displacement is 650 m north.

Explanation:

Force (F) = 500 N

Distance (d) = 16 m

work done (w) =?

We know that

w = F * d

= 500 * 16

= 8000 Joule.

The bulldozer performs 8000 Joule.

Hope it will help you :)❤

Answer:

Explanation:

Mass - 3

Height - 1

Gravity - 1

Velocity - 2

Potential Energy: mgh

Kinetic Energy: 1/2mv^2

Answer:

-1.24 m/s

Explanation:

Total momentum before collision = total momentum after collision

Total momentum before collision = (mass of full back * velocity of fullback) + (mass of lineman * velocity of line man).

Mass of full back = 112 kg, mass of line bag = 120 kg, velocity of full back  6 m/s (east), velocity of line back = -8 m/s (west). Hence:

Total momentum before collision = (112 * 6) + (120 * -8) = 672 - 960 = -288 kgm/s

The total momentum after collision = (mass of full back + mass of line back) * velocity after collision.

Let velocity after collision be v, hence:

The total momentum after collision = (112 + 120)v = 232v

Total momentum before collision = total momentum after collision

-288 = 232v

v = -288 / 232

v = -1.24 m/s

Therefore after collision, the two players would move at a velocity 1.24 m/s west (the same direction as the lineman).

Answer: the force of static friction of the sleigh on the crate

Explanation:

The force that is responsible for the crates increase in speed up the hill is the force of static friction of the sleigh on the crate.

When a light horizontal push is applied and which isn't enough to move the box, the static friction force will also be directly opposite to the push.

When an individual pushes harder, the force of the friction will then be enough to create a push.

Answer:

11 times

Explanatiom:

756 fourty

Answer:

C

Explanation:

I believe that it's C

Answer:

The answer is below

Explanation:

Charlee's law states that the volume of a gas is directly proportion to the temperature of the gas at constant pressure. That is:

V = kT, where V = volume and T = temperature, k = constant. Therefore:

V / T = k

[tex]\frac{V_1}{T_1}=\frac{V_2}{T_2}[/tex]

Given that: [tex]V_1=3\ m^3, T_1=20^oC=(20 + 273)K=293\ k,T_2=60^oC=(60 + 273)K=333\ k.\\\\\frac{V_1}{T_1}=\frac{V_2}{T_2}\\\\\frac{3}{293}=\frac{V_2}{333} \\\\V_2=\frac{3}{293}*333\\\\V_2=3.41\ m^3\\[/tex]

The new volume is 3.41 m³. That is it expands by 0.41 m³

Answer:

0.02484

Explanation:

Trust me bro

Answer:

In 2019, the IUCN Red List reported approximately 28,000 species of in danger of disappearing from the wild.

Explanation:

The IUCN Red List is a glossary of animal and plant species that are in danger of extinction, dividing the severity of the danger into different colors where red is synonymous with those species in critical danger of disappearing.

The 2019 Red List showed that more than 28,000 species of animals, plants and other living beings are in a situation of critical danger, notable examples being the Iberian Lynx and the Bornean Orangutan, among many others.

Answer:

The pressure given by the water at the bottom is 58,800 Pa

Explanation:

Pressure Exerted by a Column of Liquid

The pressure P exerted by a column of liquid of height h and density ρ is given by the hydrostatic pressure equation:

P = ρgh

Where ρ is the density of the liquid, g is the acceleration of gravity g=9.8m/s^2, and h is the height of the column of liquid.

The height of water in a well is h=6 m. The density of water is a known quantity:

[tex]\rho = 1,000\ kg/m^3[/tex]

Calculating P:

P = 1,000*9.8*6

P = 58,800 Pa

The pressure given by the water at the bottom is 58,800 Pa

Answer:

220km

Explanation:

Given parameters:

Distance traveled from Minnehaha to Nut Plains  = 11km

Distance traveled to Dover  = 209km

Unknown:

The distance the soft drink distributor traveled  = ?

Solution:

To solve this problem, we  must understand that distance is the total length of path covered in a journey.

 So;

     Distance  = 209km + 11km  = 220km

The soft drink distributor covered 220km

Answer:

Explanation:

let's find the acceleration

[tex]v = u + at \\ 8 = 0 \times a \times 2.5 \\ \alpha = 3.2m {s}^{ - 2} [/tex]

then distance

[tex] {v}^{2} = {u}^{2} + 2as \\ {8}^{2} = 2 \times 3.2 \times s \\ \\ s = 10m [/tex]

Answer:

B. 2K + Br2 + 2KBr

D. C + 02 → CO2

Explanation:

In balancing a chemical reaction, the number of atoms on both sides of the expression must be the same in order to obey the law of conservation of mass.

According to the law of conservation of mass, in a chemical reaction, matter is neither created nor destroyed.

 So, let us investigate:

                                                 Number of atoms

                            Reactants                                        Products

K                                  2                                                      2

Br                                 2                                                      2

C + 0₂ → CO₂

C                                1                                                        1

O₂                              2                                                      2

We see that for both equations, the number of atoms on both sides of the expression is the same.

Answer:

D

Explanation:

Edg2020

Answer:

Explanation:

The sealed bottle serves as an open system for the water molecules, thus heat energy can be exchanged with its surroundings. When the bottle is placed in a warm environment, there would be a gradual increase in the thermal energy of the molecules of water due to a change in the temperature of its surroundings.

Thus, the molecules of water closer to the boundary of the bottle absorbs heat, becomes lighter and changes position. This gradual process continues until all molecules attains an average temperature which equals that of the surroundings of the bottle.

Therefore, both the thermal energy and temperature of the water increases.

Answer:

what is the question?????????????????????

Answer:

The current is 1 A

Explanation:

Current in a Series Connection

When two or more elements are connected in series, all of them have the same current, and the sum of their individual voltages is the total voltage applied to the circuit.

According to Ohm's law:

V=R.I

Where V is the voltage, R is the resistance and I is the current of a circuit.

We have a voltage of V=1.5 V + 1.5 V = 3 V and a resistance of R=3 ohms.

We can calculate the current by solving for I:

[tex]\displaystyle I=\frac{V}{R}=\frac{3}{3}=1\ A[/tex]

The current is 1 A

Answer:

once the parachute is opened, the air resistance overwhelms the downward force of gravity. The net force and the acceleration on the falling skydiver is upward. ... The skydiver thus slows down. As the speed decreases, the amount of air resistance also decreases until once more the skydiver reaches a terminal velocity.

Explanation:

As the parachute is opened the air and due to the downward force of gravity the resource is upwards hence the skydiver falls slowly.

A parachutist is one who uses a parachute when making a skydive. Once the parachute is opened the air offers some resistance and due to the downward force of gravity.

The net force and force of acceleration are on the skydiver and a, as a result, he falls slowly. As the speed gets decreased the amount of air resistance will also decrease.

Find out more information about the  parachutist

brainly.com/question/26067196

Answer:

first one : 0.11

second one : 0.28

Explanation:

I took the test and got it right!!!!!

Answer:

Nobody knows...

Explanation:

First, we need to understand what we mean by sound and temperature. Sound is the vibration of particles traveling as a wave. Temperature is a measure of energy in a system of particles. A higher temperature means the particles have a higher energy, higher energy means they're moving around faster, and that faster motion makes them more capable of carrying sound waves.

Answer:

kinetic energy to electrical energy.

Answer:

d the disk in a computer hard drive

Explanation:

because hard drive use magnetic memory tostore giga- and terabytes of data in computer.

The disk in a computer hard drive is an application that uses magnets to store information.

Magnets are materials which are produce magnetic properties and make use of magnetic fields.

Magnets are used on various appliances such as speakers, microphones, computer hard disks, electromagnets, etc.

Hard disks make use of the magnetic properties of magnets to store information.

Therefore, the disk in a computer hard drive is an application that uses magnets to store information.

Learn more about magnets at: https://brainly.com/question/16236550

#SPJ2

Answer:

In mY Knowledge

Energy transfer is the movement of energy from one location to another. Energy transformation is when energy changes from one type to another. While energy can be transferred or transformed, the total energy always remains the same.

Hope iT HeLps :D

Answer:

You can tell if energy has been transferred when something works when you put a body of energy in it. For example, you'll know when energy is transferred if you plug a lamp cord into an electric socket and the lamp turns on. Energy is being transferred from the socket to the lamp.  

You can tell when energy is being transformed when it changes from one energy to another. You can know when energy is being transformed when you turn on a stove. Chemical energy transforms into electric energy.

I hope that helps!

If it is correct, may I be brainliest?

Answer:

The spring stretches or compresses 0.8 m (80 cm)

Explanation:

Hooke's Law

The force (F) needed to stretch or compress a spring by some distance Δx is given by

[tex]F=-k\Delta x[/tex]

Where k is a constant factor characteristic of the spring.

We are given the constant of a spring k=50 N/m and it's required to calculate the displacement Δx produced by a force of F=40 N. Solving for Δx:

[tex]\displaystyle \Delta x=\frac{F}{k}[/tex]

[tex]\displaystyle \Delta x=\frac{40}{50}[/tex]

Calculating:

[tex]\displaystyle \Delta x=0.8\ m[/tex]

The spring stretches or compresses 0.8 m (80 cm)