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Q: How do you find final velocity given height and mass?

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since time is given you are done

Without distance, you have to know time, initial velocity, and acceleration, in order to find final velocity.

(acceleration X time) + beginning velocity = final speed

This can't be done with just final velocity and time. You need to know the acceleration. If you do know the acceleration, multiply it by the time, and subtract that from the final velocity.

Distance = |(v2 - u2)/(2a)| where initial velocity = u final velocity = v accelaration = s

Use the formula Acceleration = (final velosity - initial velocity)/ time.

In that case, you don't have enough information.

1/2mv^2 = mgh

v = 2s/t - u where u=initial velocity, v=final velocity, s = distance and t = time

You use the information you're given, along with the equations and formulas you know that express some kind of relationship between the information you're given and the initial and final velocity.

Time = distance / average speed Average speed = 1/2 (initial + final)

One formula that can be used - assuming constant acceleration, of course! - is vf2 = vi2 + 2as, where vf is the final speed, vi is the initial speed, a is the acceleration and s is the distance. In your case, solve for final velocity.

The final velocity is (the initial velocity) plus (the acceleration multiplied by the time).

If you take initial velocity(Vi) to be zero and the final velocity (Vo) to be a known. Puting the knowns into a triganonomical equation and solving for the value of D would give an answer

You subtract the initial velocity from the final velocity and divide by the time interval.

Kinetic energy is equal to potential energy during the change

If you know the initial and final velocity you can determine the acceleration (Velocity final- Velocity initial)/time = acceleration This can also be seen by integrating the acceleration. In this case lets assume acceleration is constant, then: acceleration=C Integration from time=initial to time=final gives C*(time final-time initial)=velocity final-velocity initial This integration scheme can also work if acceleration is not constant. In this case you must know how acceleration or velocity changes with time.

Assuming you also know the final velocity and acceleration over the displacement then the initial velocity is Vinitial = (Vfinal2 - 2*acceleration*displacement)0.5

if by 'you', you mean 'u' then u is the initial velocity v is the final velocity. you need to know the initial velocity in trajectory question (motion of an object through the air) to find height, acceleration, time etc.

Yes.

If you have the mass, you can find the acceleration from Newton's Second Law, a=F/m where a is the acceleration, m is the mass, and F is the force. Then the velocity is given by the standard formula v=vo+at where v is the final velocity, vo the velocity at t=0, probably 0 in your case. If so v=at.

You can't. You need either the final velocity or the acceleration of the object as well, and then you can substitute the known values into a kinematics equation to get the initial velocity.

Kinematics. Final velocity squared = initial velocity squared + 2(gravitational acceleration)(displacement)

Get the value of initial velocity. Get the angle of projection. Break initial velocity into components along x and y axis. Apply the equation of motion .

To find acceleration you subtract initial velocity from final velocity and divide it by time.