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
vodomira [7]
2 years ago
6

In the figure, a baseball is hit at a height h = 1.20 m and then caught at the same height. It travels alongside a wall, moving

up past the top of the wall 1.1 s after it is hit and then down past the top of the wall 4.8 s later, at distance D = 54 m farther along the wall. (a) What horizontal distance is traveled by the ball from hit to catch? What are the (b) magnitude and (c) angle (relative to the horizontal) of the ball's velocity just after being hit? (d) How high is the wall?
Physics
1 answer:
pickupchik [31]2 years ago
8 0

Answer:

D.

Explanation:

The ball travels distance D in ∆t = 2.60 s. Therefore, the x component of the initial velocity is D =v

ox

​

 ⇒ ∆t = D/∆t = 15.4 m/s Due to the symmetry of projectile motions, it takes 1.2 seconds the ball to reach the initial height after passing the top of the wall downward. Therefore, the total flight time is t

tot

​

 = 1.2 + 2.6 +1.2 = 5 s The horizontal range is R = v

ox

​

t

tot

​

 = 77.0 m  

By symmetry, the ball reaches the peak of the motion at time t

top

​

 = t

tot

​

/2 = 2.5 s At the peak, the y component of the velocity is zero. Thus we have 0 = v

oy

​

 – gt

top

​

 ⇒ v

oy

​

  = gt

top

​

= 24.5 m/s The height of the wall is equal to the height of the ball at t = 1.2 s h = y (t = 1.2 s) = v

oy

​

 +v

oy

​

t – (1/2)gt

2

  = 23.3 m

You might be interested in
7. These temperatures were recorded in Pasadena for a week in April. 87 85 80 78 83 86 90 Find each of these. (a) Mean (e) Range
slega [8]

Answer:

a) Mean = 84.14

b) Median = 85

c) Mode = no mode (since there is no variable that appears more than once in this dataset)

d) Midrange = 84

e) Range = 12

f) Variance = 14.69

g) Standard deviation = 3.83

Explanation:

The raw data to be processed is

87 85 80 78 83 86 90

a) Mean = (Σx)/N

The mean is the sum of variables divided by the number of variables

x = each variable

N = number of variables = 7

Mean = (87+85+80+78+83+86+90)/7

Mean = 84.14

b) Median is the number in the middle of the dataset when the variables are arranged in ascending or descending order.

Arranging the data in ascending order

78, 80, 83, 85, 86, 87, 90

The number in the middle is the 4th number = 85

Median = 85

c) Mode is the variable that occurs the most in a distribution.

For this question, all of the variables occur only once, with no variable occurring more than once. Hence, there is no mode for this dataset.

d) Midrange is the arithmetic mean of the highest and lowest number in the dataset.

Mathematically,

Midrange = (Highest + Lowest)/2

Midrange = (90 + 78)/2

Midrange = 84

e) Range is the difference the highest and the lowest numbers in a dataset.

Range = 90 - 78 = 12

f) Variance is an average of the squared deviations from the mean.

Mathematically,

Variance = [Σ(x - xbar)²/N]

xbar = mean

Σ(x - xbar)² = (78 - 84.14)² + (80 - 84.14)² + (83 - 84.14)² + (85 - 84.14)² + (86 - 84.14)² + (87 - 84.14)² + (90 - 84.14)² = 102.8572

Variance = (102.8572)/7

Variance = 14.69

g) Standard deviation = √(variance)

Standard deviation = √(14.69)

Standard deviation = 3.83

Hope this Helps!!!

8 0
3 years ago
Read 2 more answers
Which statement is true of a concave lens?
natka813 [3]
It produces only virtual images is the answer
5 0
3 years ago
Read 2 more answers
A student looks at ocean waves coming into the beach. An ocean wave with more energy will A) have a greater height. B) have a gr
attashe74 [19]

It would be A: Have a greater height.


The higher the wave the higher the energy!

3 0
2 years ago
Read 2 more answers
when you park alongside a curb, the front and back wheels must be parallel and no more than ....... inches from the curb
Rainbow [258]

Between 12 to 18 inches.

The front and back wheels must be parallel and within at least 12 to 18 inches of the curb while parking next to a curb on a level street. If there is no curb, park parallel to the road.

➤ The following specific parking guidelines apply to painted colored curbs:

Only stop at a white light long enough to pick up or drop off mail or passengers.

Green-Park only for a short while. For time limits, look for a sign that is put adjacent to the green zone or the time limit that is painted on the curb.

Yellow-Stop for no longer than the indicated amount of time to load or unload cargo or passengers. Noncommercial vehicle drivers are typically expected to stay behind the wheel.

No stopping, standing, or parking is permitted (buses may stop at a red zone marked for buses).

Blue-parking is only allowed for a disabled person or the driver of a disabled person who has a placard or special license plate for disabled people or disabled veterans. A no-parking zone is defined as a crosshatched (diagonal lines) area adjacent to a designated disabled parking space.

Find more on parking related questions at : brainly.in/question/7229826

#SPJ4

7 0
1 year ago
PLEASE HELP ME FAST!!!!!!!!!!!!!!!! WILL GIVE BRAINLIEST!!! PLEASE. Explain in three to five complete sentences, why scientists
zavuch27 [327]
<span>Well iron, nickle, and cobalt can be natural magnets because they have minerals or metals that generate a stable magnetic field without artificial inducement. A piece of wood cannot be a natural magnet because it does not have metals or minerals that allow it to generate a stable magnetic field. Other types of metals that are magnetic are man made.</span>
5 0
3 years ago
Other questions:
  • A frog is at the bottom of a 17-foot well. Each time the frog leaps, it moves up 3 feet. If the frog has not reached the top of
    5·1 answer
  • Suzy drops a rock from the roof of her house. Mary sees the rock pass her 2.9 m tall window in 0.134 sec. From how high above th
    7·1 answer
  • At constant pressure, the volume of a fixed mass of gas and its kelvin temperature are said to be
    6·2 answers
  • A phone cord is 6.48 m long. The cord has a mass of 0.253 kg. A transverse wave pulse is produced by plucking one end of the tau
    6·1 answer
  • Give at least one fact about subatomic particles
    7·1 answer
  • Can someone please arrange the three mediums in order of least to the most density?
    5·1 answer
  • A healthy environment depends on biogeochemical cycles maintaining a balance of input and output. When forests are cut down, whi
    6·2 answers
  • What is the current if a charge of 25 coulombs passes in 5 seconds?
    9·1 answer
  • Suppose a treadmill has an average acceler-
    12·1 answer
  • What would be the answer for this and how?
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!