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
Katena32 [7]
3 years ago
12

Help ASAP plsssss:///

Physics
1 answer:
kenny6666 [7]3 years ago
8 0

Answer:

c

Explanation:

You might be interested in
Susan's 10.0kg baby brother Paul sits on a mat. Susan pulls the mat across the floor using a rope that is angled 30? above the f
elena-s [515]

Answer:

The speed after being pulled is 2.4123m/s

Explanation:

The work realize by the tension and the friction is equal to the change in the kinetic energy, so:

W_T+W_F=K_f-K_i (1)

Where:

W_T=T*x*cos(0)=32N*3.2m*cos(30)=88.6810J\\W_F=F_r*x*cos(180)=-0.190*mg*x =-0.190*10kg*9.8m/s^{2}*3.2m=59.584J\\ K_i=0\\K_f=\frac{1}{2}*m*v_f^{2}=5v_f^{2}

Because the work made by any force is equal to the multiplication of the force, the displacement and the cosine of the angle between them.

Additionally, the kinetic energy is equal to \frac{1}{2}mv^{2}, so if the initial velocity v_i is equal to zero, the initial kinetic energy K_i is equal to zero.

Then, replacing the values on the equation and solving for v_f, we get:

W_T+W_F=K_f-K_i\\88.6810-59.5840=5v_f^{2}\\29.097=5v_f^{2}

\frac{29.097}{5}=v_f^{2}\\\sqrt{5.8194}=v_f\\2.4123=v_f

So, the speed after being pulled 3.2m is 2.4123 m/s

8 0
3 years ago
Fill in the blank question.
puteri [66]
Answer is on the image with the explanation. I hope that might help you with the answers

4 0
1 year ago
One billiard ball is shot east at 2.00 m/s. A second, identical billiard ball is shot west at 1.00 m/s. The balls have a glancin
dimulka [17.4K]

Answer:

Velocity is 1.73 m/s along 54.65° south of east.

Explanation:

Let unknown velocity be v, mass of billiard ball be m and east direction be positive x axis.

Here momentum is conserved.

Initial momentum = Final momentum

Initial momentum = m x 2i + m x (-1)i = m i

Final momentum = m x v + m x 1.41 j = mv + 1.41 m j

Comparing

mi = mv + 1.41 m j

v = i - 1.41 j

Magnitude of velocity

      v=\sqrt{1^2+(-1.41)^2}=1.73m/s        

Direction,  

       \theta =tan^{-1}\left ( \frac{-1.41}{1}\right )=-54.65^0             

Velocity is 1.73 m/s along 54.65° south of east.

5 0
3 years ago
(science)<br>pls help, due today and I have alot more to do​
Effectus [21]

Answer:

I can help

Explanation:

hold on

8 0
3 years ago
HELP ME PLEASEEEEEEEEEEEEEE
cestrela7 [59]

Answer:

u r right

Explanation:

it is A. DNA

i took that class.

:)

6 0
2 years ago
Read 2 more answers
Other questions:
  • A star has a surface temperature of 30,000 K. At what wavelength does the peak radiation occur? 100 nm
    15·2 answers
  • The earth takes 1 year to revolve around the sun at 1 A.U. distance (an astronomical unit = 93,000,000 miles). If a planet were
    13·1 answer
  • A spring stretches by 18 cm when a bag of potatoes weighing 56 N is suspended from its end. How much elastic potential energy in
    8·1 answer
  • Both gamma rays and x-rays are used to see inside the body. Which one is used to make images of bones?
    14·2 answers
  • A 63.0-kg man is riding an escalator in a shopping mall. The escalator moves the man at a constant velocity from ground level to
    6·1 answer
  • This graph indicates that the kinetic energy of an object is increasing. What is the most reasonable explanation for this observ
    10·1 answer
  • A ball is thrown straight up with an initial speed of 30 m/s. How long will it take to reach the top of its trajectory, and high
    14·1 answer
  • A 32 kg object has a momentum of 480 kg m/s northward. What is the
    11·2 answers
  • How do the sclera and the cornea compare?
    12·1 answer
  • 3. A cat walks 0.220km North, then 0. 120 km South in a time of 400 seconds. whats the displacement and average velocity?
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!