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
bixtya [17]
3 years ago
14

A baseball is hit so that it travels straight upward after being struck by the bat. A fan observes that it takes 2.90 seconds fo

r the ball to reach its maximum height. a) Find the balls initial velocity b) Find the height it reaches
Physics
1 answer:
Natasha_Volkova [10]3 years ago
4 0
We'll assume that the whole scene takes place on Earth.
So the acceleration of gravity is 9.8 m/s² downward.

a).  Gravity makes anything fall 9.8 m/s faster every second.
That's the same thing as rising 9.8 m/s slower every second.

If it takes 2.9 seconds to reach its maximum height, then
it must have started out rising at (9.8 x 2.9) = 28.4 m/s.

b).  The ball left the bat at 28.4 m/s.
After 2.9 seconds, its speed was zero. (That's why it started falling.)
It's average speed during the climb was

                 1/2 (28.4 + 0)  =  14.2 m/s .

It rose straight up at an average speed of 14.2 m/s for 2.9 seconds,
so it reached a maximum  height of

                 (14.2 x 2.9)  =   41.2 meters    .   
You might be interested in
How does work affect energy between objects so it can cause a change in the form of energy? Work transfers energy. Work changes
IceJOKER [234]

'Doing work' is a way of transferring energy from one object to another, energy is transferred when a force moves through a distance.

If i explain with formula

Work done (J) = Energy transferred (J)

So more energy, more work done bc u transferred more energy to move the object and doing the work. and if you only use a little of energy, the work done also only a little.

4 0
3 years ago
What is current and si unit<br>​
Art [367]

Answer:

The SI unit of current is ampere which measures the flow of electric charge across a surface at the rate of one coulomb per second.

5 0
3 years ago
As wavelength increase, the frequency of the wave increases / decreases.
Sveta_85 [38]

Answer:

Hey heres your ans

Explanation:

Wavelength will increase

Tq

6 0
3 years ago
______ is an offer to repair or replace a product if there is a problem with the product?
ANTONII [103]
<span>A warranty is an offer to repair or replace a product if there is a problem with the product. Warranties are written guarantee issued to the consumer by the manufacturer at the time of purchase, promising to repair or replace a faulty material. It is usually based on the premise that the product is free from defects in materials and workmanship. It claims that the manufacturer constructed the product out of proper materials, and would compensate the consumer should there be any defects. The period to file a claim typically varies. Some manufacturers place a 90 day period, some a year and a few, even more.</span>
6 0
4 years ago
A radio tower emits energy in the form of waves. These waves travel great distances. Some of them even leave Earth and travel
Elena-2011 [213]
Light because it is an electromagnetic wave and they can travel through the vacuum in outer space.
3 0
3 years ago
Read 2 more answers
Other questions:
  • Questions 1 – 5 use the following word bank to place the correct letter in the space that correctly completes the sentence. A.PA
    15·1 answer
  • A car traveling in a straight line has a velocity of +4.4 m/s. after an acceleration of 0.65 m/s2 , the car's velocity is +8.3 m
    12·1 answer
  • Most subcultures do not reject all of the values and practices of the larger society. Please select the best answer from the cho
    12·2 answers
  • How many electrons does eaach shell hold?
    12·1 answer
  • Frost wedging occurs when water seeps into a crack in a rock, freezes, and causes the crack in the rock to widen.
    10·1 answer
  • Determine the value of the resistor r so that a current of 0.5a flows through the load.
    14·1 answer
  • The image of the lemon is at point I. What is the size of the image compared to the size of the lemon?
    8·2 answers
  • If you see orange construction signs and cones on a freeway, you must:
    14·1 answer
  • A ball is thrown straight up from the ground with an unknown velocity. It reaches its highest point after 5.5 s. With what veloc
    8·1 answer
  • A heat engine is used to convert heat into which of the following?
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!