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When a rock thrown straight up climbs for 3.00 s before falling. Neglecting air resistance with what velocity did the rock strike the ground?
You can use Newton's equations of motion:
At the top of the climb its velocity u = 0 m/s
Its acceleration is acceleration due to gravity a ≈ 9.8 m/s
Time of descent t = time of ascent = 3.00 s
(I'll assume positive is towards the ground)
v = u + at
≈ 0 m/s + 9.8 m/s² × 3.00 s
= 29.4 m/s
HOWEVER, this is the velocity (towards the ground) reached when the rock has returned to height from which it was thrown (released) above the ground - unless the rock was "thrown" by an explosive force at ground level, the rock will not have reached the ground at this point: there is still the distance from which it was "thrown".
Which means its final velocity at ground level can be found using:
v² = u² + 2as
v = velocity it hits the ground
u ≈ 29.4 m/s (as found above)
s = distance above ground from which the rock was "thrown" = height_of_throw m
a = acceleration due to gravity ≈ 9.8 m/s
→ v² = u² + 2as
→ v ≈ √((29.4 m/s)² + 19.6 m/s² × height_of_throw m)
= √(864.36 + 19.6 × height_of_throw) m/s
What else can I help you with?
When Neglecting air resistance a blowing ball falling from the top of ten story building will have?
You did not exactly finish your question. Are you looking for velocity, force or some sort of bounce? Velocity can be found with v2 = v1t + 1/2at2 or v2 = acceleration times distance Kinetic energy is KE= 1/2mv2
What is the hypothesis of how does air resistance affect the velocity of falling objects?
The object opposes the air and while falling of the object the initial velocity will become zero , and the final velocity will have some value's this is how air will resist the velocity of falling object ...........
If a ball thrown straight up climbs for 3.0 s before falling Neglecting air resistance with what velocity was the ball thrown?
The initial velocity of the ball can be calculated using the kinematic equation: v = u - gt, where v is the final velocity (0 m/s at the top of the motion), u is the initial velocity, g is the acceleration due to gravity (9.81 m/s^2), and t is the time taken to reach the top (3.0 seconds). Solving for u, the initial velocity is approximately 29.43 m/s.
What is the maximum velocity of a falling person?
The maximum velocity of a falling person in free fall is terminal velocity, which is about 120 mph (200 km/h). This occurs when the force of air resistance equals the force of gravity, resulting in a constant velocity.
The speed when falling objects no longer accelerates due to air resistance is?
known as terminal velocity, which is reached when the force of gravity pulling the object downwards is balanced by the upward force of air resistance. At terminal velocity, the object falls at a constant speed with no further acceleration.
What is a skydivers downwords velocity after 1 second when falling from a hovering helicopter?
Neglecting air resistance his velocity after 1 second will be 9.81 m/sec or 32.2 ft/sec.
When Neglecting air resistance a blowing ball falling from the top of ten story building will have?
You did not exactly finish your question. Are you looking for velocity, force or some sort of bounce? Velocity can be found with v2 = v1t + 1/2at2 or v2 = acceleration times distance Kinetic energy is KE= 1/2mv2
What is the hypothesis of how does air resistance affect the velocity of falling objects?
The object opposes the air and while falling of the object the initial velocity will become zero , and the final velocity will have some value's this is how air will resist the velocity of falling object ...........
What would you call it when air resistance the force of gravity and a falling object stops accelerating?
When a falling object stops accelerating but is falling at a constant velocity, it is called terminal velocity.
If a ball thrown straight up climbs for 3.0 s before falling Neglecting air resistance with what velocity was the ball thrown?
The initial velocity of the ball can be calculated using the kinematic equation: v = u - gt, where v is the final velocity (0 m/s at the top of the motion), u is the initial velocity, g is the acceleration due to gravity (9.81 m/s^2), and t is the time taken to reach the top (3.0 seconds). Solving for u, the initial velocity is approximately 29.43 m/s.
What is the maximum velocity of a falling person?
The maximum velocity of a falling person in free fall is terminal velocity, which is about 120 mph (200 km/h). This occurs when the force of air resistance equals the force of gravity, resulting in a constant velocity.
In free fall when the air resistance is equal to the weight of the falling object we say that the object has reached velocity?
In free fall, when the air resistance is equal to the weight of the falling object, we say that the object has reached ________ velocity.
The speed when falling objects no longer accelerates due to air resistance is?
known as terminal velocity, which is reached when the force of gravity pulling the object downwards is balanced by the upward force of air resistance. At terminal velocity, the object falls at a constant speed with no further acceleration.
An object is projected straight upward. Neglecting air resistance it .?
It will rise until the force of gravity on it equals the initial force used to project it upward. At that point, it will momentarily stop before falling back down due to gravity.
What is the greates velocity a falling object can reach called?
The greatest velocity a falling object can reach is called terminal velocity. Terminal velocity occurs when the force of air resistance on the object matches the force of gravity pulling it down, resulting in a constant speed.
How does air resistance affect terminal velocity?
Air resistance increases as an object's speed increases. At terminal velocity, the upward force of air resistance equals the downward force of gravity, resulting in a constant velocity. The greater the air resistance, the lower the terminal velocity of an object falling through the air.
What if a falling object reaches this when forces of gravity and air resistance are balanced?
terminal velocity
