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If a brick falls from the top of a building and strikes the ground with a velocity of 39.2 meters per second down how long does the brick fall?
Wiki User
∙ 14y ago
Acceleration of gravity = 9.8 m/sec2.
39.2 / 9.8 = 4 seconds
Wiki User
∙ 14y ago
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What is the velocity of a stone dropped of a building 318 meters?
Ignoring any effects due to air resistance, the speed of the stone is zero at the instant it's dropped, and increases steadily to 78.98 meters per second when it hits the ground. The velocity is directed downward throughout the experiment.
A stone that is initially t rest is dropped from the top of a building ot falls for 5.0 s before hotting the ground how tall is the building?
You have to let me ignore air-resistance for this one. Since I don't know anything about the shape or size of the stone, I can't calculate any effects of air. Initial velocity = 0 Final velocity = 5 x acceleration = 5 x G = 5 x (9.8 meters / sec2) = 49 meters per second Average velocity during the fall = 1/2 x ( 0 + 49 ) = 24.5 meters per second Distance of the fall = (24.5 meters per second) x (5 seconds) = 122.5 meters = 401.9 ft(approx., rounded)
What is acceleration and its si unit?
Acceleration is the rate of change of velocity - how fast a velocity changes. Therefore, its units are naturally (meters/second) / second, usually written as meters/second2.Acceleration is the rate of change of velocity - how fast a velocity changes. Therefore, its units are naturally (meters/second) / second, usually written as meters/second2.Acceleration is the rate of change of velocity - how fast a velocity changes. Therefore, its units are naturally (meters/second) / second, usually written as meters/second2.Acceleration is the rate of change of velocity - how fast a velocity changes. Therefore, its units are naturally (meters/second) / second, usually written as meters/second2.
A gun fires a bullet off of a cliff that is 200 meters high with a muzzle velocity of 643 m per s so how far will the bullet travel before hitting the ground without air resistance?
Assuming that the gun is fired parallel to the ground, the bullet will begin to fall the instant that it leaves the muzzle. The total fall will be 200 meters. You will need to calculate how long it will take an object to fall 200 meters (hint- about 9.753 meters per second per second- or 9.753 meters the first second, 19.50 meters during the second second, etc) THEN multiply the velocity of the bullet (643 meters/ second) by the number of seconds it is in flight. That will be the distance when it hits the ground.
Why the time twice in unit acceleration?
An acceleration is not a velocity - it is the rate of change of velocity. In SI units, the units of velocity are meters/second. Acceleration is the rate of change of velocity, per unit time - how fast the velocity changes. Therefore, its units are velocity / time. In SI units, this gives you (meters/second) / second, usually written as meters/second2.
A brick is released with no initial speed from the roof of a building and strikes the ground in 2.00 s encountering no appreciable air drag How tall in meters is the building?
19.6m
What is the velocity of a stone dropped of a building 318 meters?
Ignoring any effects due to air resistance, the speed of the stone is zero at the instant it's dropped, and increases steadily to 78.98 meters per second when it hits the ground. The velocity is directed downward throughout the experiment.
You drop a 5 kilo ball from rest from a height of 20 meters how fast is it moving when it strikes the ground?
20 meters per second
A ball is thrown horizontally from a cliff at a speed of 15 ms and strikes the ground 45 meters from the base of the cliff How high was the cliff rounded to the nearest meter?
Answer: 44 meters
If an object is dropped from a tall building and hits the ground 3.0 sec later how tall is the building?
44 meters tall
What would be the change in velocity for a 10 gram object dropped from the roof of a 20 meter building if it takes 2 seconds to reach the ground Hint acceleration due to gravity is 9.8 ms²?
Acceleration = (change in velocity) / (time for the change)9.8 = (change in velocity) / (2 seconds)9.8 x 2 = change in velocity = 19.6 meters per second .Hint: The mass of the object and the height of the building are there just tothrow you off balance. You don't need either of them to answer the question.
A stone that is initially at rest is dropped from the top of a building it falls for 5.0s before hitting the ground how tall is the building?
The building is h=.5 gt^2 meters tall; that is = .5x9.8 x25 =122.5 meters.
What would be the change in velocity for a 10 gram object dropped from the roof of a 20 meter building if it takes 2 seconds to reach the ground Hint acceleration due to gravity is 98 ms²?
In two seconds of fall, the speed increases 19.6 meters (64.4 feet) per second. The magnitude of velocity increases by that amount, while the direction of velocity doesn't change.
A stone that is initially t rest is dropped from the top of a building ot falls for 5.0 s before hotting the ground how tall is the building?
You have to let me ignore air-resistance for this one. Since I don't know anything about the shape or size of the stone, I can't calculate any effects of air. Initial velocity = 0 Final velocity = 5 x acceleration = 5 x G = 5 x (9.8 meters / sec2) = 49 meters per second Average velocity during the fall = 1/2 x ( 0 + 49 ) = 24.5 meters per second Distance of the fall = (24.5 meters per second) x (5 seconds) = 122.5 meters = 401.9 ft(approx., rounded)
What is the velocity of a ball in meters per second that drops from a roof and the speed was at 3.03 seconds?
If the ball was dropped from a roof and hit the ground 3.03 seconds later, then when it hit the groundits velocity was 29.694 meters (97.42 feet) per second (rounded) downward.
What are the dimensions of the Chrysler building?
319 meters = 1046 feet high 77 floors above ground.
What is the velocity when falling 1000 meters?
Ther velocity when falling 1000 meters is v=sqroot(2x1000x9.8) = 140 meters/second.
