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
Seesaw unbalanced force explain
wolverine [178]
Like a seesaw, it shows that the forces aren’t equal because if it was the seesaw would stay put
3 0
3 years ago
Suppose that you are standing on a train accelerating at 0.20g (where g is the acceleration due to gravity). What minimum coeffi
prisoha [69]

Answer:

0.2

Explanation:

The given parameters are;

The acceleration of the train, a = 0.2·g

The mass of the person standing on the train = m

Let μ represent the coefficient of static friction, we have;

The force acting on the person, F = m × a = m × 0.2·g

The force of friction acting between the feet and the floor, F_f = m·g·μ

For the person not to slide we have;

The force acting on the person = The force of friction acting between the feet and the floor

F = F_f

∴ m × 0.2·g = m·g·μ

From which we get;

0.2 = μ

The coefficient of static friction that must exist between the feet and the floor if the person is not to slide, μ = 0.2.

7 0
3 years ago
The color of light most readily absorbed by water is _________.
zheka24 [161]

answer is the color white

3 0
3 years ago
How do you find acceleration due to gravity with time and height given?
Feliz [49]

Here, height is given which will be the distance for a freely falling object.

The velocity will be

v=\text{ }\frac{h}{t}

and the acceleration will be

a=\frac{v}{t}

In this way, the formula works.

3 0
1 year ago
7Which of the following terms describes how glaciers move?
tatuchka [14]

Answer:

D is the answer  I think (0 w 0 )

Explanation:

7 0
3 years ago
Read 2 more answers
Other questions:
  • The compound LiBr is an example of
    12·1 answer
  • The theory that light exists in quantized "chunks" was proposed in response
    11·2 answers
  • The small increase in global oil production coupled with an increased demand for those resources leads to _______.
    15·2 answers
  • a magnet has a 20 cm magnetic field if a piece of metal is 18 cm from the magnet will it be attracted or not
    14·1 answer
  • A friend asks you how much pressure is in your car tires. You know that the tire manufacturer recommends 30 psi, but it's been a
    8·1 answer
  • Write three example for types of energy​
    6·2 answers
  • Light with a wavelength of λ = 614 nm is shone first on a single slit of width w = 3.75 μm. The single slit is then replaced wit
    11·1 answer
  • Select the correct answer from each drop-down menu.
    12·2 answers
  • Draw the well labelled diagram of thermo flask.​
    10·1 answer
  • An object has a gravitational force of 111N acting on it. If it had 4 times more mass, what would the force on it be?
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!