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Firdavs [7]
3 years ago
10

Three people pull simultaneously on a stubborn donkey. Jack pulls directly ahead of the donkey with a force of 79.9 N , Jill pul

ls with 73.3 N in a direction 45° to the left, and Jane pulls in a direction 45° to the right with 137 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.
Physics
1 answer:
Lena [83]3 years ago
8 0

Answer:

Explanation:

Please refer the following link for your answer

https://www.assignmentexpert.com/homework-answers/physics-answer-73840.pdf

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A baseball has a mass of 0.15 kg. The baseball is pitched so that it is 1 meter above home plate and moving at 40 m/s. What is t
viktelen [127]

Answer:

K.E = 120 Joules.

Explanation:

<u>Given the following data;</u>

Mass = 0.15kg

Distance = 1m

Velocity = 40m/s

To find kinetic energy;

Kinetic energy can be defined as an energy possessed by an object or body due to its motion.

Mathematically, kinetic energy is given by the formula;

K.E = \frac{1}{2}MV^{2}

Where;

  • K.E represents kinetic energy measured in Joules.
  • M represents mass measured in kilograms.
  • V represents velocity measured in metres per seconds square.

Substituting into the equation, we have;

K.E = \frac{1}{2}*0.15*40^{2}

K.E = 0.075*1600

<em>K.E = 120 Joules.</em>

<em>Therefore, the kinetic energy of the baseball is 120 Joules. </em>

8 0
3 years ago
Create a hypothesis for this testable question: How does price affect the amount of chocolate people buy?
Wittaler [7]

Answer:

IF the price of chocolate increases, THEN the amount of chocolate people buy decreases

Explanation:

In a scientific investigation, an observation is first made. Based on this observation, a scientific question is then asked. However, a HYPOTHESIS is given next to explain the question asked. A hyothesis is a testable explanation given to solve an observed problem or provide a possible answer to a question.

The hypothesis must be subject to testing via EXPERIMENTATION. A hypothesis usually goes in an IF, THEN format. In this case with the testable question: How does price affect the amount of chocolate people buy?

A hypothesis that can explain this question is: IF the price of chocolate increases, THEN the amount of chocolate people buy decreases.

5 0
3 years ago
Malachi uses some glue to fix a broken plate. He puts the glue under a desk lamp but the glue doesn't dry. Then he puts the glue
Semmy [17]

Answer:

The sun gives off a type of light that carries energy, and the light from the desk lamp does not

Explanation:

I got it off a Quizlet hope this helps!!

4 0
3 years ago
The model of the Adam has changed over time in light of new knowledge and discoveries. Which option correctly describes one such
katrin [286]
I think the correct answer from the choices listed above is option 3. The statement that correctly describe such change would be that about 1900 J.J. Thomas discovered electrons were negatively charged particles. Hope this answers the question. Have a nice day.
5 0
4 years ago
A ball is thrown vertically down from the edge of a cliff with a speed of 4 m/s, how high is the cliff, if it took 12 s for the
Vesna [10]

Answer:

The height of the cliff from which the ball was dropped from is 224.4m.

\overline{v}={\frac{\Delta x}{\Delta t}}

Given the data in the question;

Initial velocity of the ball;

Time taken by the ball to reach the ground;

Distance or Height of the cliff from which the ball was thrown from;

To get the height of the Cliff, we use the Second Equation of Motion:

Where s is the distance or height,  is the initial velocity, t is the time and a is the acceleration. Since the ball was thrown down from a certain height (cliff), its is now under the influence of gravity. acceleration due to gravity;

Hence, the equation becomes

We substitute the given values into the equation

Therefore, the height of the cliff from which the ball was dropped from is 224.4m

Explanation:

3 0
3 years ago
Read 2 more answers
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