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
Lunna [17]
3 years ago
9

Three people pull simultaneously on a stubborn donkey. Jack pulls directly ahead of the donkey with a force of 77.3 N, Jill pull

s with 61.7 N in a direction 45° to the left, and Jane pulls in a direction 45° to the right with 147 N. (Since the donkey is involved with such uncoordinated people, who can blame it for being stubborn?) Find the magnitude of the net force the people exert on the donkey. Magnitude of the net force: _____N What is the direction of the net force? Express this as the angle from straight ahead between 0° and 90°, with a positive sign for angles to the left and a negative sign for angles to the right.
Direction of the net force: _____°
Physics
1 answer:
DiKsa [7]3 years ago
3 0

Answer:

F_{net} = 232.8 N

towards right so it is -15 degree

Explanation:

Net force in forward direction due to all three is given as

F_x = F_1 + F_2cos45 + F_3cos45

here we know that

F_1 = 77.3 N

F_2 = 61.7 N

F_3 = 147 N

F_x = 77.3 + 61.7 cos45 + 147 cos45

F_x = 224.9 N

Similarly in Y direction we will have

F_y = F_3 sin45 - F_2 sin45

F_y = (147 - 61.7)sin45

F_y = 60.3 N

Now the net force on the donkey is given as

F_{net} = \sqrt{F_x^2 + F_y^2}

F_{net} = \sqrt{224.9^2 + 60.3^2}

F_{net} = 232.8 N

Now direction of force is given as

tan\theta = \frac{F_y}{F_x}

tan\theta = \frac{60.3}{224.9}

\theta = 15^o towards right so it is -15 degree

You might be interested in
Which group within the Senate has the most power over legislation?
ozzi
<span>the majority party................</span>
5 0
4 years ago
Turning on and listening your favorite TV show is an example of
tensa zangetsu [6.8K]

Answer:

Electrical Energy and Sound Energy

Explanation:

4 0
3 years ago
The difference in a brass rod and steel rod is same as 12cm at all temperature .Find the length of the rod at 0°C.​
egoroff_w [7]

Answer:

I think its 12 cm itself. Because in the question it is said that the length is same in all temperature

5 0
3 years ago
A river flows at a velocity of 3 km/h relative to the riverbank. A boat moves downstream at a velocity of 15 km/h relative to th
Sidana [21]

Answer:

18km/h

Explanation:

vector addition

7 0
3 years ago
A right triangle has base b = 100 plusminus 1 ft and adjacent angle theta = 30 degree plusminus 0.5 degree. Calculate the height
aivan3 [116]

Answer:

The height h of this right triangle is 57.74±1.74ft.

Explanation:

Knowing that this is a right triangle, if one of the angles adjacent to the base, θ is 30º, the other angle is 90º. Therefore we can calculate the height h can be calculated with the tangent:

tan(\theta)=\frac{h}{b}\leftrightarrow h=tan(\theta)b=tan(30^\circ)100ft=57.74ft

For the uncertainty we use the  partial derivatives:

\Delta h=|\frac{dh}{db}|\Delta b+ |\frac{dh}{d\theta}|\Delta \theta\\\Delta h=|tan(\theta)|\Delta b+ |\frac{b}{cos^2(\theta)}|\Delta \theta

We have to be careful to use Δθ in radians:

\Delta h=|tan(30^\circ)|1ft+ |\frac{100ft}{cos^2(30^\circ)}|\frac{0.5^\circ2\pi}{360^\circ}=1.74ft

4 0
3 years ago
Other questions:
  • An electromagnetic radio wave is received by a transmitter before it is converted to a sound wave. The radio wave has a waveleng
    8·2 answers
  • Two positively charged particles are separated on an axis by 0.1 meters, and q1 has a 6 µC charge and q2 has a 2 µC charge. Reca
    11·2 answers
  • Which of the following statements is not true?
    11·1 answer
  • What is the name of the force that is a combination of all forces that act on an object?
    12·1 answer
  • What is the leading cause for change between states of matter?
    8·1 answer
  • How much wind is needed to blow away a piece of paper and what distance does it need to be to the fan for it to do so?
    9·1 answer
  • PLS ANSWER FAST 15 POINTS
    6·1 answer
  • Help me!!!!!!!!!!!!!!!!!!!!!!!
    7·1 answer
  • Please help will be marked most brainlist !!!
    8·1 answer
  • What does the wavelength of light determine?
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!