Physics, 04.03.2021 14:00, brashley

A 3.00 kg cart on a track is pulled by a string so that it accelerates at 2.00 m/s/s. The force of tension in the string is 10.0 N. What is the force of friction on the cart?

Answers: 2

Show answers

Answers

answered: tangia

If the track is horizontal and the string is pulled horizontally, the friction on the cart would be $4.0\; \rm N$ .

Explanation:

Let denote the mass of this cart, and let denote the acceleration of this cart.

$m = 3.00\; \rm kg$ .

$a = 2.00\; \rm m \cdot s^{-2}$ .

Apply Newton's Second Law to find the net force on this cart.

$\begin{aligned}\text{Net Force} &= m \cdot a\\ &= 3.00\; \rm kg \times 2.00\; \rm m\cdot s^{-2}\\ &= 6.00\; \rm N\end{aligned}$ .

The following forces act upon this cart:

(downward) gravitational attraction from the earth,(upward) normal force from the track,(forward) tension from the string, and(backward) friction from the track.

Assume that the track is horizontal, and that the string was pulled horizontally. The normal force from the track would exactly balance the downward gravitational attraction from the earth. Hence, the $6.00\; \rm N$ net force on this cart would be equal (in size) to the size of the tension from the string ( $10.0\; \rm N$ ) minus the size of the friction from the track.

In other words:

$\begin{aligned}&\text{Size of Net Force}\\ &= \text{Size of Tension} - \text{size of friction}\end{aligned}$ .

$\begin{aligned}& 6.00\;\rm N = 10.0\; \rm N - (\text{size of friction})\end{aligned}$ .

$\text{size of friction} = 10.0\; \rm N - 6.00\; \rm N = 4.0\; \rm N$ .

answered: Guest

-first use of geothermal energy occurred more than 10,000 years ago in north america by american paleo-indians

-the first industrial use of geothermal energy began near pisa, italy in late 18th century

-in 1904, italian scientist piero ginori conti invented the first geothermal electric power plant in which steam was used to generate the power

-with the above experiment, the first geothermal plant in usa started in 1922 with a capacity of 250 kilowatts

-however, in 1946 first ground-source geothermal heat pump installed at commonwealth building in portland, oregon

-during the 1960’s, pacific gas and electric began operation of first large scale geothermal power plant in san francisco, producing 11 megawatts

-in 1973, when oil crisis began many countries began looking for renewable energy sources and by 1980’s geothermal heat pumps (ghp) started gaining popularity in order to reduce heating and cooling costs

-as effect of climate change started showing results, governments of various countries joined hands to fight against it, for which kyoto protocol was signed in japan in 1997, laid out emission targets for rich countries and required that they transfer funds and technology to developing countries, 184 countries have ratified it

hope this

answered: Guest

answer: 2×10^-2kg

explanation: density= mass per volume

vol=mass/density

converting to s.i units we have;

3÷1000kg = 0.003

1.5÷100m = 0.15

0.003/0.15 = 0.02kg

Other questions on the subject: Physics

Physics, 21.06.2019 17:00, 2sally2

We all use gps today, even if we don't drive yet. i bet you have been in the car with a parent and they have asked you to get out your phone to find a specific location. in your car, on the phone, you are using a very sophisticated technology. gps satellites circle the earth twice a day in a very precise orbit and transmit signal information to earth. gps receivers take this information and use trilateration to calculate the user's exact location. essentially, the gps receiver compares the time a signal was transmitted by a satellite with the time it was received. the time difference tells the gps receiver how far away the satellite is. now, with distance measurements from a few more satellites, the receiver can determine the user's position and display it on the unit's electronic map. what type of signal is utilized by the gps satellite?

Answers: 2

continue

Physics, 22.06.2019 10:00, lorelei7668

(a) calculate the number of electrons in a small, electrically neutral silver pin that has a mass of 10.0 g. silver has 47 electrons per atom, and its molar mass is 107.87 g/mol. (b) imagine adding electrons to the pin until the negative charge has the very large value 1.00 mc. how many electrons are added for every 109 electrons already present

Answers: 3

continue

Physics, 22.06.2019 13:00, mandilynn22

Nacidified solution was electrolyzed using copper electrodes. a constant current of 1.18 a caused the anode to lose 0.584 g after 1.52 ✕ 103 s. given that the charge of an electron is 1.6022 ✕ 10−19 c, calculate avogadro's number. assume that copper is oxidized to cu2+ ions.

Answers: 1

continue

Physics, 22.06.2019 14:30, tblynch21

Which of the following bonds would be most polar? a. c-i b. c-br c. c-cl d. c-f e. c-o

Answers: 1

continue

Do you know the correct answer?

A 3.00 kg cart on a track is pulled by a string so that it accelerates at 2.00 m/s/s. The force of t...