38 feet
Asked by maham237 @ in Mathematics viewed by 132 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?
Asked by maham237 @ in Mathematics viewed by 132 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
Asked by wiki @ in Health viewed by 1081 persons
Asked by wiki @ in Social Studies viewed by 617 persons
Asked by vanshika149 @ in English viewed by 960 persons
Asked by rajesh064 @ in English viewed by 1087 persons
Asked by jaylord7 @ in Mathematics viewed by 936 persons
Asked by jesus643 @ in History viewed by 1179 persons
Asked by kavin044 @ in English viewed by 1093 persons
Asked by nevaeh10 @ in English viewed by 1338 persons
Asked by dog3636R @ in English viewed by 1127 persons
Asked by timothy2 @ in Biology viewed by 1236 persons
Asked by noah5213 @ in English viewed by 1334 persons
Asked by elijah67 @ in World Languages viewed by 1288 persons
Asked by wiki @ in Business viewed by 1511 persons
Asked by maham237 @ in Mathematics viewed by 18208 persons
Asked by admin @ in Mathematics viewed by 8047 persons
Asked by admin @ in Mathematics viewed by 5706 persons
Asked by maham237 @ in Mathematics viewed by 3903 persons
Asked by maham237 @ in Mathematics viewed by 3194 persons
Asked by maham237 @ in Mathematics viewed by 2892 persons
Asked by maham237 @ in Mathematics viewed by 2734 persons
Asked by maham237 @ in Mathematics viewed by 2523 persons
Asked by maham237 @ in Mathematics viewed by 2440 persons
Asked by maham237 @ in Mathematics viewed by 2390 persons
Asked by maham237 @ in Mathematics viewed by 2388 persons
Asked by maham237 @ in Mathematics viewed by 2043 persons
Asked by maham237 @ in Mathematics viewed by 1764 persons