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A ball thrown vertically upward returns to the starting point in 8 seconds.find its initial velocity.?

The total time of flight for a ball thrown vertically upwards and returning to its starting point is twice the time taken to reach maximum height. Therefore, the time taken to reach maximum height is 4 seconds. Given that the acceleration due to gravity is -9.8 m/s^2, using the kinematic equation v = u + at, where v is the final velocity (0 m/s at maximum height), u is the initial velocity, a is the acceleration due to gravity, and t is the time, you can solve for the initial velocity. Substituting the values, u = 9.8 * 4 = 39.2 m/s. Therefore, the initial velocity of the ball thrown vertically upward is 39.2 m/s.


With what initial velocity would an object have to be thrown downward to fall 240 meters in 5 seconds?

During the 5 seconds, gravity adds 5G = (5 x 9.78) = 48.9 meters/sec to the object's downward speed.During that time, it's average downward speed is 1/2 of [ Vi + (Vi + 48.9) ] = Vi + 24.45 m/s.In 5 seconds it falls 5(Vi + 24.45) = 5Vi + 122.25 meters.5Vi + 122.25 = 240 meters5Vi = 240 - 122.25 = 117.75 metersVi = 117.75 / 5 = 23.55 meters per sec.


Family crisis logic puzzle answer?

# One and two cross, one returns, four seconds. # Four and five cross, two returns, nineteen seconds. # Three and one cross, one returns, twenty-six seconds. # One and two cross, twenty-nine seconds


What is the duration of Initial D?

The duration of Initial D is 3300.0 seconds.


What is the duration of Traveling Hopefully?

The duration of Traveling Hopefully is 1740.0 seconds.


What is the duration of Billy the Kid Returns?

The duration of Billy the Kid Returns is 3180.0 seconds.


What is the duration of Tracy Beaker Returns?

The duration of Tracy Beaker Returns is 1680.0 seconds.


What is 9.8 meters per seconds squared?

it is the downward aceeleration of the earth


How many feet are you traveling if you are going 43.5 MILES per hour in 1.1 seconds?

You are traveling 70.18 feet every 1.1 seconds at 43.5 mph


An object is dropped and falls to the ground with acceleration of g if its thrown upward at an angle its acceleration would be 0 larger than g g upward g downward or none of the above?

The acceleration of the object would still be g downward, regardless of the angle at which it is thrown upward. The acceleration due to gravity always acts in the downward direction towards the center of the Earth. The only difference would be the horizontal component of the velocity due to the initial angle of the throw.


What is the rocks speed after 3 seconds in m s if it encounters no air resistance?

Acceleration of gravity is 9.8 m/s.If you hold your hand steady and drop the rock, its downward speedafter 3 seconds is (9.8 x 3) = 29.4 m/s.If you throw it down and it leaves your hand with a speed of 'S', thenits downward speed after 3 seconds is (S+29.4) m/s.


If you are traveling at 55 mph you will cover over 800 feet in 15 seconds?

YES. At 55 miles per hour you are traveling at 80.67 feet every second. This means that every 15 seconds you are traveling 1,210.05 feet.