No. The projectile is always moving and its velocity is never zero. The equations that you have are valid from the time it starts moving until just before the projectile hits the ground.Asem said:can I say final velocity is equal to zero?
Good! Remember this for future reference: In projectile motion problems that give you the time of flight (or ask you to find the time of flight), always start with the equations for the vertical motion. That's because the value of g is what determines how long a projectile stays in the air.Asem said:Vf=0, when t=1s
Vf=Viy+at
Viy=9.8*1
Viy=Visin
9.8=Visin(40)
Vi=15.2
Thank you, sir
Yes.Asem said:I just have one more question; Vertical motion is symmetric in projectile right? So, is Initial velocity = Final velocity? If projectile is launched from ground level I mean.
No. When the projectile returns to the same level, the final speed is the same as the initial speed. The horizontal component of the velocity is the same while the final vertical component has the same magnitude but opposite direction from the initial component.Asem said:I just have one more question; Vertical motion is symmetric in projectile right? So, is Initial velocity = Final velocity? If projectile is launched from ground level I mean.
The formula for finding initial velocity of a projectile is V0 = (x/tanθ) - (1/2)(g)(x2)/(V0cosθ)2, where V0 is the initial velocity, θ is the angle of launch, g is the acceleration due to gravity, and x is the horizontal distance traveled.
The angle of launch can be determined using the inverse tangent function, θ = tan-1(y/x), where y is the vertical distance traveled and x is the horizontal distance traveled.
Yes, this formula can be used for any type of projectile as long as the initial velocity, flight time, and angle of launch are known.
There are other methods for finding the initial velocity of a projectile, such as using the range equation or using a projectile motion calculator. However, the formula mentioned above is the most accurate and reliable method.
The initial velocity should be in meters per second (m/s), the flight time should be in seconds (s), the angle of launch should be in degrees (°), and the distance traveled should be in meters (m).