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
Harrizon [31]
3 years ago
12

A person throws a ball straight up in the air. The ball rises to a maximum height and then falls back down so that the person ca

tches it. Consider the ball while it is in the air. Which of the following statements are true? Just after the ball leaves the person's hand the direction of the acceleration is up. The acceleration is zero when the ball reaches its maximum height. The acceleration is about 9.8 m/s2 (down) when the ball is falling.
Physics
1 answer:
Lana71 [14]3 years ago
5 0

Answer:

The acceleration is about 9.8 m/s2 (down) when the ball is falling.

Explanation:

The ball at maximum height has velocity zero

t = Time taken

u = Initial velocity

v = Final velocity

s = Displacement

a = Acceleration due to gravity = 9.8 m/s² (positive downward and negative upward)

v=u+at\\\Rightarrow 0=u-9.8\times t\\\Rightarrow u=9.8t

The accleration 9.8 m/s² will always be acting on the body in opposite direction when the body is going up and in the same direction when the body is going down. The acceleration on the body will never be zero

You might be interested in
Calculate the work done when a 6 N force of friction is applied through 9 m.
eduard

Answer:

The work done is 54Joules

5 0
3 years ago
WILL GIVE BRAINLIEST
Lubov Fominskaja [6]

Answer:

I would measure the distance between points A and B

8 0
3 years ago
Liam está empujando una caja pesada por una rampa a una velocidad constante. Hay fricción entre la rampa y la caja. La caja
Citrus2011 [14]

Answer:

Liam played danganrampa

Explanation:

5 0
3 years ago
Help me do the c.....​
frez [133]

yup they r equal as mentioned above is equal magnitude and direction! so they r totally equal.

as one vector has 2 things which is used to define it ->

  1. Magnitude
  2. direction

so if both r equal then both vectors r equal vectors

3 0
3 years ago
Read 2 more answers
A football kicked off at an angle 20° from the ground reaches a maximum height of 4.7 m. What is the initial velocity of the kic
Svetradugi [14.3K]
The motion of the football that is being kicked follows a projectile path and is parabolic in shape. It has a maximum height  of meters and the angle with respect to the ground is  degrees. The maximum height is the highest position vertically that the ball could reach. From the equations of an object in a projectile motion, we use the equation <span>(V*sin20)^2 = 2gh  in order to solve for velocity, V. We do as follows:

</span><span>((V) (sin(20)))^2 = 2gh  
(V^2) (0.342^2) = 92.12 
V = √ (92.12 / 0.342^2)
V = 28.06 m/s

</span>The initial velocity of the kick would be 28.06 m/s.
6 0
3 years ago
Other questions:
  • The buoyant force exerted by a liquid is equal to the _____ of the fluid displaced. mass weight volume density
    10·2 answers
  • "The burning of fossil fuels produces gases which are capable of trapping heat resulting into the current rise in the global tem
    5·1 answer
  • You place a 3.0-m-long board symmetrically across a 0.5-m-wide chair to seat three physics students at a party at your house. If
    5·1 answer
  • Example: A wooden crate with mass 100kg is at rest on a stone floor. You know that the coefficients of kinetic and static fricti
    14·1 answer
  • The planet zeta has 2 times the gravitational field strength and sane mass as the earth , how does the radius of zeta compare wi
    15·1 answer
  • Of the following is true about glass recycling
    11·1 answer
  • Hooke’s law describes the linear relationship between stress and strain through Young’s modulus. Given two materials under the s
    5·2 answers
  • A circular radar antenna on a Coast Guard ship has a diameter of 2.10 m and radiates at a frequency of 16.0 GHz. Two small boats
    12·1 answer
  • Which image illustrates the bouncing of a light wave off of a surface?
    10·2 answers
  • Waves are often caused by
    13·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!