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
Dahasolnce [82]
3 years ago
14

A tennis racket hits a tennis ball with a force of F=at−bt2, where a = 1290 N/ms , b = 330 N/ms2 , and t is the time (in millise

conds). The ball is in contact with the racket for 2.80 ms . If the tennis ball has a mass of 55.6 g , what is the resulting velocity of the ball, v, after the ball is hit by the racket?
Physics
1 answer:
denpristay [2]3 years ago
6 0

Answer:

The resulting velocity of the ball after it hits the racket was of V= 51.6 m/s

Explanation:

m= 55.6 g = 0.0556 kg

t= 2.8 ms = 2.8 * 10⁻³ s

F= 1290 N/ms * t - 330 N/ms² * t²

F= 1024.8 N

F*t= m * V

V= F*t/m

V= 51.6 m/s

You might be interested in
A student measures the pH of a solution to be 6.8. Which should the student add if she wants to decrease the pH of the solution?
zloy xaker [14]
The neutral pH is 7. Less than 7 indicates an acid and more than 7 indicates a base (up to 14).
<span> NaCl - it's a salt (we can't measure the pH)
H2O - it can be an acid but also a base  (the pH it is almost neutral,meaning close to 7 )
HF - it is a strong acid
</span><span> KOH  - it is a strong base (pH=14)
</span>
                        ↓

He needs to use HF (Hydrogen fluoride) to decrease the pH.


7 0
3 years ago
Read 2 more answers
What are important things about mental health
Paul [167]

Answer:

Mental health includes our emotional, psychological, and social well-being. It affects how we think, feel, and act. It also helps determine how we handle stress, relate to others, and make healthy choices. Mental health is important at every stage of life, from childhood and adolescence through adulthood

Explanation:

8 0
3 years ago
Read 2 more answers
a particle moves at a constant speed in a circular path. the instantaneous velocity and instantaneous acceleration vectors are:
Lilit [14]

The instantaneous velocity always tangential to circular path and          instantaneous acceleration always points towards the center of circle.

What is instantaneous?

The definition of instantaneous velocity is the rate of change of location during a time that is virtually zero .The replica was. The definition of instantaneous velocity is the speed of a moving item at a certain instant in time.

The rate of change of location during a relatively brief period of time is known as instantaneous velocity.

In the limit when the time (and thus the displacement) between the two places approaches zero, the instantaneous acceleration is the average acceleration between two points on the route.

so, both of them are perpendicular to each other.

To learn about instantaneous velocity

brainly.com/question/1222392

#SPJ4

8 0
1 year ago
What happens to the mechanical energy of an apple as it falls from a tree?
Vikentia [17]

Answer:

When the apple falls from the tree, it has some gravitational potential energy due to its height. Now, When it starts falling, the Gravitation Potential energy will starts converting into the Kinetic Energy. When the apple is about to strikes the ground, the Gravitational Potential energy have been converted into the Kinetic Energy.

Explanation:

4 0
3 years ago
According to ohm's law what is the resistance of a light bulb if the applied voltage is 21 volts and the current is 3 amps?
Nady [450]
Resistance = voltage/current = 21/3 = 7Ω
6 0
3 years ago
Other questions:
  • NEED HELP ASAP!!!
    9·1 answer
  • Which group is the most common sedimentary rock
    9·1 answer
  • The question is on the picture.
    6·2 answers
  • StA
    11·1 answer
  • HELP ASAP!! The voltage from a power supply to a light bulb is increased by 2 volts and the current is recorded. A graph of this
    12·1 answer
  • If you exert a force of 10.0 n to lift a box a distance of 0.9 m how much work do you do
    9·1 answer
  • Water is boiled in a pan on a stove at sea level. During 10 min of boiling, it is observed that 200 g of water has evaporated. T
    13·1 answer
  • Consider shining a laser through a small circular hole. The resulting diffraction pattern will look like a bullseye - a series o
    13·1 answer
  • Que substâncias deveria escolher para diminuir a basicidade ou para diminuir a acidez de uma solução? *
    9·1 answer
  • Даю 60 ПОМОГИТЕ знайти опір кола зображеного на рисунку якщо кожний з опорів дорівнює 2 ом
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!