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SIZIF [17.4K]
3 years ago
7

A bridge spanning a river is 98.0 meters above the water.

Physics
1 answer:
svetlana [45]3 years ago
7 0
Yes that ya 56.4 because dropped bridge to hit the water
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A cannonball is tired with an initial speed of 40m/s and a launch angle of 30degrees from a cliff that is 25m tall. a. What is t
ella [17]

Answer:

Part a)

t = 5.1 s

Part b)

x = 176.7 m

Explanation:

Initial speed of the launch is given as

v_i = 40 m/s

angle = 30 degree

Now the two components of the velocity

v_x = v_i cos30

v_x = 34.6 m/s

similarly we have

v_y = v_i sin30

v_y = 20 m/s

Part a)

Now to find the time of flight we will have

\Delta y = v_y t + \frac{1}{2}at^2

-25 = 20 t -\frac{1}{2}(9.81)t^2

t = 5.1 s

Part b)

Distance at which the ball will land is given as

x = v_x t

x = 34.6 (5.1)

x = 176.7 m

Part c)

Since x direction there is no acceleration so it will move with uniform speed while in y direction it will accelerate due to gravity

7 0
3 years ago
What are some problems associated with the introduction of an exotic species into an ecosystem?
vodomira [7]
People in public getting killed
5 0
3 years ago
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An car is brought to rest in a distance of 652 m using a constant acceleration of -2.7 m/s2. What was the
Goshia [24]

Answer:

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Explanation:

7 0
3 years ago
Why do the passengers in high-altitude jet planes feel the sensation of weight while passengers in an orbiting space vehicle, su
kykrilka [37]

Passengers in an aircraft are subject to the Normal and Gravity Force acting on them at a low 'orbit', so tiny that it can be many times compared to the same surface of the earth when speaking in general terms.

In a high orbit space vehicle or in the same space, said force decreases considerably or simply disappears, generating the sensation of weightlessness.

Remember that the Force of Gravity is given under the principle

F_g = \frac{GMm}{r^2}

Where,

G = Gravitational Universal constant

M = Mass of the planet

m = mass of the object

r = Distance from center of the planet

When the radius grows considerably the gravitational force begins to decrease.

7 0
3 years ago
1. The planet Jupiter completes a revolution of the sun in 11.5 years. Express it in seconds. Given that one year= 3.154 × 10^7
xenn [34]

Answer:

The planet Jupiter completes one revolution of the sun in 362710000 seconds. Long time, right?

Explanation:

3.154x10^7=3.154x10000000=31540000

11.5x31540000=362710000

7 0
2 years ago
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