38 feet
Asked by maham237 @ in Mathematics viewed by 136 People
a bridge is 38 feet above a river. how many seconds does it take a rock dropped from the bridge to pass by a tree limb that is 10 feet above the water?
Answered by maham237 @
Answer:it will take 1.32 seconds
Step-by-step explanation:
The height of the bridge above the river is 38 feet
The height of the tree limb above the river is 10 feet
Disaster from the bridge to the tree limb = 38 - 10 = 28feet. The rock will travel 28feet before it passes the tree limb. To determine the time, we will apply Newton's equation of motion.
h = ut + 1/2 ×gt^2
where
h = height of the rock
t = time taken for the rock to fall
u = initial velocity of the rock.
g = acceleration of the object and it is also acceleration due to gravity.
From the information given,
h = 28 feet
g = 32.2ft/s^2
u = 0(velocity of the rock starts from 0 and increases as it keeps falling)
28 = 0×t + 1/2 × 32.2 × t^2
28×2 = 32.2 × t^2
t^2 = 56/32/2 = 1.74
t = √1.74 = 1.32 seconds
Similar Questions
Overcoming fixed mindset: a step-by-step guide to cultivating a growth mindset
Asked by wiki @ in Health viewed by 1259 persons
Which of the following would best complete this list?
Asked by wiki @ in Social Studies viewed by 725 persons
What had the king decided to do before he saw the spider
Asked by vanshika149 @ in English viewed by 1118 persons
Describe the karez in your own words
Asked by rajesh064 @ in English viewed by 1282 persons
What is 8 + (x + 5)?
Asked by jaylord7 @ in Mathematics viewed by 1074 persons
What is the topic of the info grapher
Asked by jesus643 @ in History viewed by 1371 persons
Elephant kills 11 in nepal , woman rescued from a friendly dolphine
Asked by kavin044 @ in English viewed by 1246 persons
What is the central idea of this excerpt? the goatherd wants the wild goats to join his herd. the bad weather keeps all the goats in their enclosure. the goatherd gives his own goats just enough food to survive. the wild goats leave because the goatherd mistreats his own goats.
Asked by nevaeh10 @ in English viewed by 1573 persons
What is the subject complement in the sentence ‘a long walk up the hill made us tired '
Asked by dog3636R @ in English viewed by 1320 persons
(-3,0);slope =2/3
Asked by timothy2 @ in Biology viewed by 1629 persons
Which is an example of situational irony in "wherefore art thou romeo?”
Asked by noah5213 @ in English viewed by 1555 persons
According to the elements of style, which sentence is written in active voice? the acceptance speech was given by the award winners. the pennants were won by the championship team. a memorable evening was had by all who attended the event. the workers took precautions while digging along power lines.
Asked by elijah67 @ in World Languages viewed by 1506 persons
How to enhance knowledge regarding environmental factors through capsim?
Asked by wiki @ in Business viewed by 1819 persons
Most viewed questions in Mathematics
Unit 6 similar triangles homework 2 similar figures answer key
Asked by maham237 @ in Mathematics viewed by 18341 persons
All things algebra unit 7 polygons and quadrilaterals answer key
Asked by admin @ in Mathematics viewed by 8139 persons
Gina wilson all things algebra 2016 answer key unit 11
Asked by admin @ in Mathematics viewed by 5764 persons
Unit 1 geometry basics homework 4 angle addition postulate answers
Asked by maham237 @ in Mathematics viewed by 3929 persons
Unit 6 exponents and exponential functions homework 8 answer key
Asked by maham237 @ in Mathematics viewed by 3246 persons
The manager of a vacation resort believes that the ages
Asked by maham237 @ in Mathematics viewed by 2918 persons
What is 271 403 rounded to the nearest ten thousand
Asked by maham237 @ in Mathematics viewed by 2780 persons
Unit 1 geometry basics homework 3 angle relationships answer key
Asked by maham237 @ in Mathematics viewed by 2572 persons
Why would a prism beat a sphere in a competition?
Asked by maham237 @ in Mathematics viewed by 2473 persons
An artist sells a painting for 20.50 but uses 5.75
Asked by maham237 @ in Mathematics viewed by 2423 persons
Unit 4 congruent triangles homework 1 classifying triangles answer key
Asked by maham237 @ in Mathematics viewed by 2413 persons
Unit 4 congruent triangles homework 2 angles of triangles
Asked by maham237 @ in Mathematics viewed by 2068 persons
Compare the values of the 2s and 5s in 55220
Asked by maham237 @ in Mathematics viewed by 1788 persons