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
Liono4ka [1.6K]
3 years ago
10

To test the quality of a tennis ball, you drop it onto the floor from a height of 4.00 m. It rebounds to a height of 2.00 m. If

the ball is in contact with the floor for I2.0 ms, (a) what is the magnitude of its average acceleration during that contact and (b) is the average acceleration up or down?
Physics
1 answer:
arlik [135]3 years ago
7 0

Answer:

Part a)

a = 1260.3 m/s^2

Part b)

Direction = upwards

Explanation:

When ball is dropped from height h = 4.0 m

then the speed of the ball just before it will strike the ground is given as

v_f^2 - v_i^2 = 2 a d

v_1^2 - 0^2 = 2(9.81)(4.0)

v_1 = 8.86 m/s

Now ball will rebound to height h = 2.00 m

so the velocity of ball just after it will rebound is given as

v_f^2 - v_i^2 = 2 a d

0 - v_2^2 = 2(-9.81)(2.00)

v_2 = 6.26 m/s

Part a)

Average acceleration is given as

a = \frac{v_f - v_i}{\Delta t}

a = \frac{6.26 - (-8.86)}{12.0 \times 10^{-3}}

a = 1260.35 m/s^2

Part B)

As we know that ball rebounds upwards after collision while before collision it is moving downwards

So the direction of the acceleration is vertically upwards

You might be interested in
When light strikes an opaque material, which of the following accurately describes what happens to the light rays? Some of the l
ExtremeBDS [4]
<span>None of the light passes through it; some of the light is absorbed as heat but most is reflected off the surface.  This is how you see </span>objects.  reflected light from them hits your eye.  (Opaque means not transparent)
8 0
3 years ago
Read 2 more answers
A block of mass 2 kg is launched by compressing a spring of force constant 1200 N/m. The block slides on a frictionless surface,
SVEN [57.7K]

Answer:

zzyibgsdwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwe

Explanation:

3 0
2 years ago
What kind of degree does an ultrasound tech. need?
Anna11 [10]
<span>Educational Requirements. Training to become an ultrasound technician can be done through a formal education program or through military training. The most common training is an associate's degree program, although there are bachelor's degree and 1-year certificate programs available.</span>
7 0
3 years ago
Effect of Solvent:
Naddik [55]

1. H2O- The water completely dissolved the salt.

Alcohol- The alcohol dissolved the salt slightly.

Glycerin-The salt has not dissolved at all.

2. Water

3. Like dissolve like basically works on the principle of polarity. It means the substances which possess similar chemical properties may dissolve in each other. For example, ethanol can be dissolved in water because both are polar in nature whereas non-polar molecules can be dissolved in non-polar solvents only.

4. Generally, a solute dissolves faster in a warmer solvent than it does in a cooler solvent because particles have more energy of movement. For example, if you add the same amount of sugar to a cup of hot tea and a cup of iced tea, the sugar will dissolve faster in the hot tea.

Learn more about The choice of solvent here:-brainly.com/question/14918321

#SPJ9

6 0
1 year ago
In an experiment, a researcher can make claims about causation
Yakvenalex [24]
<span>In an experiment, a researcher can make claims about causation if the independent variable changes because of changes made to the dependent variable. Causation works on cause and effect, so the changed independent variable is the cause and the changed dependent variable is the effect. In an experiment the independent variable is changed to determine the dependent variables value, so the two are directly related.</span>
8 0
3 years ago
Other questions:
  • Jamison spins around 5 times without moving any direction. What was the total displacement?
    15·1 answer
  • When designing an experiment, it is important to make sure your hypothesis is
    8·1 answer
  • Which of the following is/are the best example(s) of elastic collision(s)? Explain why you chose your answer(s).
    5·1 answer
  • A snail travels at a rate of 2.37 feet per minute. a. Write a rule to describe the function. b. How far will the snail travel in
    5·2 answers
  • Without the wheels, a bicycle frame has a mass of 8.29 kg. Each of the wheels can be roughly modeled as a uniform solid disk wit
    13·1 answer
  • What is Cognitive Behavioural Therapy?
    7·2 answers
  • Batteries (e.g., lead-acid batteries) store chemical energy and convert it to electric energy on demand. Batteries do not store
    9·1 answer
  • As a rocket ascends, its acceleration increases even though the net force on it stays constant. why? (assume a traveling distanc
    6·2 answers
  • What is the right hand rule for magnetic Force?
    12·1 answer
  • The mass of 04kg is rotated by a spring at a constant speed V . If the length of the string is 1m and the minimum tension is 3N,
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!