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
Svet_ta [14]
3 years ago
14

A tennis ball traveling horizontally at a speed of 40 m/s hits a wall and rebounds in the opposite direction. The time Interval

for the collision is about 0.013 s, and the mass of the ball Is 0.059 kg. Assume that the ball rebounds at the same speed.
(a) Determine the initial and final momenta of the ball. Assume the initial velocity direction is positive.

(b) Determine the change In momentum of the ball.

(c) Determine the average force exerted by the wall on the ball.
Physics
1 answer:
liubo4ka [24]3 years ago
3 0

Answer

given,

initial velocity of the ball, u = 40 m/s

final velocity of the ball, v= -40 m/s

time of contact = 0.013 s

mass of the ball = 0.059 Kg

a) initial momentum

   P₁ = m u = 0.059 x 40 = 2.36 kg.m/s

  final momentum  

   P₂ = m v = 0.059 x (-40) = -2.36 kg.m/s

b) change in momentum

      Δ P = P₂- P₁

      Δ P = -2.36 - 2.36

     Δ P = -4.72 kg.m/s

c) Average force

 average force exerted by the ball is equal to change in momentum per unit time.

     F =\dfrac{\Delta P}{t}

     F =\dfrac{-4.72}{0.013}

            F = -363 N

You might be interested in
At room temperature ice will melt while a brass lamp will stay as a solid. This must mean that the melting point of water is ___
UkoKoshka [18]
If solid, cold metal like brass doesn't melt at room temperature like ice does, than the bass can stand much more heat then a ice cube, so it needs to be hotter to melt, so the melting point of ice is lower then brass's melting point
4 0
3 years ago
Read 2 more answers
Which of the following would be the S I unit to use in measuring the temperature of a hot liquid a. Ampere b. Mole c. Celsius d.
rusak2 [61]

It would be C Celsius just took k12 test

5 0
2 years ago
Read 2 more answers
there is only one basic format for a professional report. a. audience b. All of these should be considered when deciding on a re
Anna007 [38]

Answer:

The answer is letter b. All of these should be considered when deciding on a report format.

Explanation:

A Professional Report is a type of formal document about a topic or information that is intended for a specific audience or purpose. The report's style of writing needs a lot of knowledge from the writer. Oftentimes, it involves the following important elements: <em>Title, Summary, Body, Discussion, Conclusion and Recommendation. </em>

The writer should write according to his target audience and purpose. He also needs to consider the length of his report, as well as the suitable words and sentences that he should use.

Thus, all of the choices are important in writing a professional report. So, the answer is letter b.

5 0
2 years ago
What causes the change from day to night?
stepladder [879]
Earths Rotation
Earth's rotation is the rotation of Planet Earth around its own axis. Earth rotates eastward, in prograde motion. As viewed from the north<span> pole star Polaris, Earth turns counter</span>clockwise<span>. </span>
"AB84"
7 0
3 years ago
Read 2 more answers
PLEASE HELP ME A lens with a surface that curves outward like the exterior of a sphere is __________. (Points : 1) reflected ref
yanalaym [24]
Convex.

Concave curved inward (like how a cave foes in) and convex curves outward. Reflected and refracted do not apply to a lens.
3 0
3 years ago
Read 2 more answers
Other questions:
  • The mineral barite is
    11·2 answers
  • What is the acceleration of the object?<br>______ m/s2​
    14·1 answer
  • Discuss how a battery works
    7·1 answer
  • The wheel of a car has a radius of 0.413 m. If the wheel rotates at 456 revolutions per minute, what is the speed (in m/s) at wh
    11·2 answers
  • What would the shape of a flag need to be in order to generate a cylinder?
    11·1 answer
  • A diffusion couple of two metals, A and B, was fashioned as shown in Figure 5.1. After a 26 hour heat treatment at 1050°C (and s
    7·1 answer
  • As a runner crosses the finish line of a race, she starts decelerating from a velocity of 9 m/s at a rate of 2 m/s^2. Take the r
    6·1 answer
  • Given 1 inch ≡ 2.54 cm and 1 foot ≡
    14·1 answer
  • Are stairs a type of inclined plane?
    11·2 answers
  • How did Niels Bohr create the Atomic theory
    7·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!