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
Sedbober [7]
3 years ago
7

A 60.0 kg object is moving east at 8.00 m/s, and then slows down to 4.00 m/s. How much work was done?

Chemistry
1 answer:
Colt1911 [192]3 years ago
5 0

Answer:

A

-1440J

Explanation:

Hello,

This question requires us to calculate the work done on a object to move it from point A to point B

Data

Mass = 60kg

Initial velocity (V1) = 8.0m/s

Final velocity (V2) = 4.0m/s

Workdone on an object is equal to force applied on the object to move it through a particular distance.

Work done = force × distance

Force (F) = mass × acceleration

Distance = s

F = Ma

Work done = M× a × s

But a = velocity (v) / time (t)

Work done = mvs / t

But velocity = distance/ time

Work done = mv × v/

Work done = mv²

Work done = ½mv²

Workdone = ½M(V2² - V1²)

Workdone = ½ × 60 (4² - 8²)

Work done = 30 × (16 - 64)

Workdone = 30 × (-48)

Work done = -1440J

Work done = -1.44kJ

The workdone on the object is equal to -1.44kJ

You might be interested in
What happens to ice as it melts energy
KonstantinChe [14]

Answer:

Energy is added (postive enthalpy)

Explanation:

Ice melting means solid turns into liquid. Solid is more stable than liquid thus you must put in energy to weaken the forces of solid and turn it into liquid. Thus, you must put in energy to melt ice. This makes the enthalpy of the system to be positive.

5 0
2 years ago
What is 6.3cm =____mm please help me
azamat

63 mm multiply the length value by 10  bb ♡

4 0
3 years ago
What happens in cellular respiration?
Alecsey [184]
Cellular respiration is the process of oxidizing food molecules, like glucose, to carbon dioxide and water. The energy released is trapped in the form of ATP for use by all the energy-consuming activities of the cell. The process occurs in two phases: glycolysis, the breakdown of glucose to pyruvic acid.
7 0
3 years ago
Nitric oxide reacts with chlorine gas according to the reaction: 2 NO( g) + Cl2( g) ∆ 2 NOCl( g) Kp = 0.27 at 700 K A reaction m
11Alexandr11 [23.1K]

Answer:  The initial partial pressures of NO and Cl_2 is 139.4 torr.

Explanation:

The equilibrium reaction is

                           2NO(g)+Cl_2(g)\rightleftharpoons 2NOCl(g)

initially conc.         p            p                  0

At eqm.                p-2x        p-x               2x

Given: p_{NOCl}= 2x= 115torr

x=57.5 torr

The expression for equilibrium constant is :

K_p=\frac{p_{NOCl}^2}{p_{NO}^2\times p_{Cl_2}}

p_{NOCl} = 2x =115 torr

p_{NO} = (p-2x) = p-115 torr

p_{Cl_2} = (p-x)= p-57.5 torr

Now put all the given values in this expression, we get

0.27=\frac{(115)^2}{(p-115)^2\times (p-57.5)}

p=139.4torr

Therefore, the initial partial pressures of NO and Cl_2 is 139.4 torr.

8 0
3 years ago
Which of the following is a unit of mass in the metric system? (4 points)
Ronch [10]
The correct answer is gram
6 0
3 years ago
Read 2 more answers
Other questions:
  • When 2-methylpropane is treated with bromine in the presence of UV light, one product predominates a. Identify the structure of
    8·1 answer
  • Can you help me with 2 and 3 please
    8·1 answer
  • What is 25 milliliters in cubic centimeters
    9·1 answer
  • 3 Points
    13·2 answers
  • Wasim and his friends want to test if the solution of a substance is acidic or not. These are the tests that each of them perfor
    8·1 answer
  • Q: What property of propane does Rodriguez change using the burner? Support your answer with evidence from the text.
    13·1 answer
  • Please help! its due at the end of class.
    10·1 answer
  • Which of the following will form a solution? (Select all that apply.)
    6·1 answer
  • What factor would speed up a chemical reaction
    8·2 answers
  • What are the distinguishing features of each extraction process: pyrometallurgy, electrometallurgy, and hydrometallurgy? Explain
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!