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A rock is dropped from a height of 80 m and is free fall what is the velocity of the rock as it reaches the ground 4.0 secounds later?
Wiki User
∙ 8y ago
39 m\s downward
Wiki User
∙ 8y ago
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A rock is dropped at the same instant that a ball in the same elevation is thrown horizontally which will have the greater speed when it reaches ground level?
They will both have the same speed because the will hit the ground at the same time, due to vertical velocity.
Why velocity is non zero when ball dropped to the ground?
The initial velocity of a dropped ball is zero in the y (up-down) direction. After it is dropped gravity causes an acceleration, which causes the velocity to increase. F = ma, The acceleration due to gravity creates a force on the mass of the ball.
When dropped from a building a cricket ball and a football have the same velocity or they hit the ground at same instant which more correct answer?
they hit the ground at same instant
What is A football kicked off at an angle 20 from the ground reaches a maximum height of 4.7 m What is the initial velocity of the kick?
initial velocity of the kick = 28.06 m/s
Does a ball dropped with horizontal velocity take longer to hit the ground than on dropped at rest?
no because the ball is round and it would make no difference in what side you put it on because it has no sides
A rock is dropped at the same instant that a ball in the same elevation is thrown horizontally which will have the greater speed when it reaches ground level?
They will both have the same speed because the will hit the ground at the same time, due to vertical velocity.
Why velocity is non zero when ball dropped to the ground?
The initial velocity of a dropped ball is zero in the y (up-down) direction. After it is dropped gravity causes an acceleration, which causes the velocity to increase. F = ma, The acceleration due to gravity creates a force on the mass of the ball.
A volleyball is dropped from a cliff and a soccer is thrown upward from the same position when each ball reaches the ground at the bottom of the cliff the volleyball will hit the ground with greater?
The volleyball will NOT hit the ground with greater anything. Assuming that the soccer ball is the same spherical diameter and greater mass than the volleyball it will hit the ground with greater velocity and greater impact.
When dropped from a building a cricket ball and a football have the same velocity or they hit the ground at same instant which more correct answer?
they hit the ground at same instant
A tennis ball is dropped from 1.55 m above the ground It rebounds to a height of 0.824 mWith what velocity does it hit the ground?
31 m/s
What is A football kicked off at an angle 20 from the ground reaches a maximum height of 4.7 m What is the initial velocity of the kick?
initial velocity of the kick = 28.06 m/s
What is the speed of an object weighing 80 pounds dropped from 7 feet?
it strikes the ground at a velocity of 17.9 ft/s
If an object is dropped and reaches the ground with a final velocity of 4 meter per second neglecting air friction how far did the object fall?
Use the mechanics formula Final velocity = initial velocity + acceleration * change in time 4m/s = 0 + (9.8 m/s²)t t = 0.41s distance = initial velocity * time + 1/2 accel * time² = 1/2(9.8m/s²)(0.41s)² = 0.82m
Does a ball dropped with horizontal velocity take longer to hit the ground than on dropped at rest?
no because the ball is round and it would make no difference in what side you put it on because it has no sides
On the Moon if a basketball and a feather are dropped from the same height about the ground which one hits first?
both reaches the ground at the same time because in the moon there occurs free fall.
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.
If a ball is dropped from a balloon that is 640 feet above the ground and rising at a rate of 48 feet per second find the time the ball is in the air and the speed of the ball when it hits the ground?
Let v be the velocity when the ball is at 640 feets going downwards v = 48 feet /sec let the velocity with which it reaches the ground be u then, u2=v2+2gh g = acc due t ogravity in feet/sq.sec h = 640 feet the time taken to reach the ground = time to return to 640ft + the time to fall from there Time taken to get to the ground is 8 seconds. Final velocity is 208 feet per second downwards
