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
zvonat [6]
3 years ago
6

Please helppppppppppppp

Physics
1 answer:
artcher [175]3 years ago
4 0

The ball's initial velocity must be 28.0 m/s

Explanation:

The motion of the ball in this problem is a projectile motion, so it follows a parabolic path, consisting of two separate motions:  

- A uniform motion (constant velocity) along the horizontal direction  

- An accelerated motion with constant acceleration (acceleration of gravity) in the vertical direction  

First, we study the vertical motion of the ball: since it is a uniformly accelerated motion, we can use the suvat equation  to find the time it takes for the ball to reach the ground,

s=ut+\frac{1}{2}at^2  

where  

s = 40 m is the vertical displacement, the height of the cliff (we chose downward as positive direction)  

u = 0 is the initial vertical velocity of the ball

t is the time of flight of the ball

a=g=9.8 m/s^2 is the acceleration of gravity  

Solving for t, we find:

t=\sqrt{\frac{2s}{g}}=\sqrt{\frac{2(40)}{9.8}}=2.86 s  

Now we can analyze the horizontal motion: since this is a uniform motion, the horizontal speed is constant, and it is given by

v_x = \frac{d}{t}

where:

d = 80 m is the horizontal distance covered by the ball

t = 2.86 s is the time of flight

Substituting,

v_x = \frac{80}{2.86}=28.0 m/s

Learn more about projectile motion:

brainly.com/question/8751410

#LearnwithBrainly

You might be interested in
A small object is attached to the end of a relaxed, horizontal spring whose opposite end is fixed. The spring rests on a frictio
eduard

Answer:4A

Explanation:

Given

Mass is displace x= A units from its mean position x=0'

When it is set to free it will oscillate about its mean position with maximum amplitude A i.e. from x=-A to x=A

One cycle is completed when block returns to its original position

so first block will go equilibrium position x=0 and then to x=-A

from x=-A it again moves back to x=0 and finally back to its starting position x=A

so it travels a distance of A+A+A+A=4A    

7 0
3 years ago
Does the following decrease or increase normal force? Pulling up on the object.
Sav [38]

Answer:

gravy+gravity = time X nuclious so your ANSWER WILL BE gravity ;-;

Explanation:

6 0
3 years ago
Read 2 more answers
You are riding a bicycle at 20 m/s at 10:00 am. At 10:01 am, you notice that you are traveling at 40 m/s. You are headed W. What
Juliette [100K]

Answer:

20m/s^2

Explanation:

Acceleration=Change in velocity/time taken for change

40-20/1

20m/s^2

7 0
3 years ago
Vector e is 0.111m long in a 90 deg direction. Vector f is 0.233 m long in 400 deg direction. Find the direction of their vector
-BARSIC- [3]

Answer:

50.6

Explanation:

7 0
3 years ago
Fl-19 in florida, if your pwc is equipped with an engine cut-off lanyard, what must you do with it?
melamori03 [73]

Answer: Attach it to clothing, personal flotation device or the person's person.

Explanation:

This particular Question or problem has to do with the rules and regulations or laws governing the use of Personal Watercraft(PWC) in the state of Florida in the United States of America. Hence, one of the rules that is applicable to the use of boats and waterways or the use of personal watercraft in Florida is that in florida, if ones pwc is equipped with an engine cut-off lanyard the person operating it must ATTACH IT TO THE CLOTHING, PERSONAL FLOATATION DEVICE IR THE OPERATORS' PERSON.

Another rule band the use of flammable personal flotation device with Personal Watercraft(PWC) in the state of Florida. All this rules and guildlines are made to limit or minimize hazards.

3 0
3 years ago
Other questions:
  • An object moving on the x axis with a constant acceleration increases its x coordinate by 82.9 m in a time of 2.51 s and has a v
    7·1 answer
  • Two beams of coherent light start out at the same point in phase and travel different paths to arrive at point P. If the maximum
    10·1 answer
  • The radius of the earth's very nearly circular orbit around the sun is 1.5 1011 m. find the magnitude of the earth's velocity, a
    7·1 answer
  • The region, or sphere, of influence around a magnet is called the magnetic_____.
    7·2 answers
  • Which is defined as a disturbance in matter that carries energy from one place to another?
    7·2 answers
  • Whenever using a microscope slide, you should always:
    11·2 answers
  • Which of the following has greater number of hydrogen molecule ? 9 gm of CH4 or 10gm of NH3​
    15·1 answer
  • A net force must be acting when an object Choose one or more: A. changes direction but not speed. B. changes both speed and dire
    8·1 answer
  • A rocket that has a mass of 4000 lbm travels at 27,000 ft/sec. What is most nearly its kinetic energy
    12·1 answer
  • How much work is required to move a 1 nC charge from an electric potential of 0 V to a potential of 18V?
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!