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
Jobisdone [24]
3 years ago
13

A tennis player strikes a tennis ball from underneath with her racket. The ball is sent straight up with an initial velocity of

19 m/s. How high above the striking point will the ball travel?
A. 9 m
B. 9.8 m
C. 18 m
D. 19 m
Physics
1 answer:
Stels [109]3 years ago
6 0
So the acceleration of gravity is 9.8 m/s so that’s how quickly it will accelerate downwards. You can use a kinematic equation to determine your answer. We know that initial velocity was 19 m/s, final velocity must be 0 m/s because it’s at the very top, and the acceleration is -9.8 m/s. You can then use this equation:

Vf^2=Vo^2+2ax

Plugging in values:

361=19.6x

X=18 m
You might be interested in
Which of the following is a good scientific question? A. Are dragons lizards or birds? B. How do star fish fall in love? C. Does
Wittaler [7]
<span>C. Does eating less fat increase a mouse's lifespan?
(If a mouse eats less fat in its meals then will it live longer: compared to other mice lives.

</span>This is a testable question that can be answered by designing and conducting an experiment.

I think D could be correct as well.

My final answer is D.


6 0
3 years ago
Read 2 more answers
6th grade science !!!!!!!!!!!!!!!​
posledela

Answer:

71

Explanation:

5 0
3 years ago
A 103 kg horizontal platform is a uniform disk of radius 1.71 m and can rotate about the vertical axis through its center. A 68.
Andreyy89

Answer:

I_{total}=220.64 kg*m^{2}

Explanation:

The moment of inertia of the system is equal to the each population and the platform inertia so

Inertia disk

I_{disk}=\frac{1}{2}*m_{disk}*(r_{p})^{2}

Inertia person

I_{p}=\frac{1}{2}*m_{p}*(r_{p})^{2}

Inertia dog

I_{d}=\frac{1}{2}*m_{d}*(r_{d})^{2}

The Inertia of the system is the sum of each mass taking into account that all exert the force of inertia:

I_{total}=I_{disk}+I_{p}+I_{d}

I_{total}=\frac{1}{2}*103kg*(1.71)^{2}+\frac{1}{2}*68.9kg*(1.09)^{2}+\frac{1}{2}*27.7kg*(1.45)^{2}

I_{total}=220.64 kg*m^{2}

5 0
3 years ago
A crate slides off the back of a flatbed truck that accelerated forward from rest. If the bed of the truck is frictionless, the
jolli1 [7]
The right answer should be B
5 0
3 years ago
Do solar panels create enough energy to power the car throughout the day?
JulijaS [17]

Answer:

Yes, but only if it's sunny.

Explanation:

As you know, solar panels generate energy through the sun's rays of light (better known as sunlight). Therefore, as long as the sun is shining high in the sky, the car will generate electricity and be able to function. If this vehicle was only powered by solar panels, it would not function during the night, in cloudy areas, and/or in dark places (such as parking garages or home garages).

Hope this helps!

5 0
3 years ago
Other questions:
  • a.Calculate the average speed (in km/h) of Charlie, who runs to the store 4 kilometers away in 30 minutes. b.Calculate the dista
    13·1 answer
  • The national high magnetic field laboratory holds the world record for creating the strongest magnetic field. for brief periods
    5·2 answers
  • If horizontal velocity is 5 m/s, and vertical velocity is 8 m/s, what is the magnitude of the resultant velocity?
    9·1 answer
  • PLEASE HELP ASAP I WILL GIVE BRAINLIEST!!!!!!!!
    11·2 answers
  • How does scale influence the physical and chemical properties of a substance
    8·1 answer
  • Why is it important to use democratic method of choosing someone for a position of authority
    13·2 answers
  • If a 12 V battery is connected to a light bulb with a resistance of 2 ohms, how much current will flow through the light bulb?
    15·1 answer
  • How many types of ion are formed when water splits during
    5·1 answer
  • I need help asap!!!!!!!!
    9·1 answer
  • What are the advantages of atmospheric pressure?​
    7·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!