1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
shtirl [24]
2 years ago
7

A car of mass 750kg accelerates away from traffic lights. At the end of the first 100m it has reached a speed of 12 m/s. During

this time, its engine provides an average forward force of 780 N, and the average force of friction on the car is 240 N. Calculate the increase in the car's kinetic energy at the end of the first 100 m
Physics
2 answers:
xenn [34]2 years ago
5 0

Answer:

the answer according to me is 54000j

Explanation:

im not sure why the force and friction are given inthe question because the the formula of ke is 1/mv^2

aliina [53]2 years ago
3 0

Answer:

Hruhriehrvdi8d8edeuebueufbrhddvuszu

You might be interested in
How are coal types classified?
rosijanka [135]
It’s carbon and it’s heat value
7 0
3 years ago
Read 2 more answers
What is a therapuetic modality in psychology?
noname [10]

Answer:

There are several modalities, or methods, of treatment: individual therapy, group therapy, couples therapy, and family therapy

Explanation:

4 0
2 years ago
Read 2 more answers
a 4kg block is attatched to a vertical sspring constant 800n/m. the spring stretches 5cm down. how much elastic potential energy
kow [346]

The Potential energy stored in the system is 1 J

<u>Explanation:</u>

Given-

Mass, m = 4 kg

Spring constant, k = 800 N/m

Distance, x = 5cm = 0.05m

Potential energy, U = ?

We know,

Change in potential energy is equal to the work done.

So,

U = \frac{1}{2} k (x)^2\\\\

By plugging in the values we get,

U = \frac{1}{2} * 800 * (0.05)^2\\ \\U = 400 * 0.0025\\\\U = 1J\\

Therefore, Potential energy stored in the system is 1 J

8 0
3 years ago
After watching a show about submarines, Jamil wants to learn more about the oceans. Which question could be answered through sci
Georgia [21]
The best question that could prompt a scientific investigation is: <u>What substances dissolve in ocean water?</u> 

This way the person experimenting can use several variables and make observations. Upon making observations, the person can be able to gather as much data as he can in order to answer the original question that he asked.
7 0
3 years ago
Read 2 more answers
What are the two opposing forces at work as fusion takes place in stars?
____ [38]

Answer;

1. strong nuclear force

2. electromagnetic force/ electric force

Explanation;

The more protons an element has, the harder it is to bring nuclei together. It takes more energy to trigger fusion in iron and other heavy elements. Lighter elements, such as helium and hydrogen, require less energy to bring about fusion. The sun, for instance, spends most of its life converting hydrogen into helium.

-The strong nuclear force  depends on; a more massive the object is the more attractive the force produced and also as distance between objects increases, attractive force decreases at a faster rate.

3 0
3 years ago
Other questions:
  • What is the efficiency of a tractor that has a work output of 300j and a work input of 400j
    11·1 answer
  • which of following categories of small bodies in the solar system does ceres belong to?. . . A.Dwarf Planets. B.Comets. C.Astero
    6·2 answers
  • What is direct current? In which direction does current go according to the electron flow convention?
    6·1 answer
  • A car at the top of a roller coaster and an apple in a tree both have potential energy. True False
    14·2 answers
  • Choose the correct option
    6·1 answer
  • Which of the following is an example of aerobic activity?
    15·1 answer
  • Ifa cup of coffee is at 90°C and a person with a body temperature of 36°C touches it, how will heat flow between
    13·2 answers
  • Would a larger, more heavier ball fall faster than a smaller and lighter ball?
    14·1 answer
  • Volume of water shrinks between__​
    5·2 answers
  • The figure shows the electric field inside a cylinder of radius R= 3.2 mm. The field strength is increasing with time as E= 1.4
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!