The initial velocity of the ball was
+4.90 m/s
(up).
How do you find the initial velocity?
- Work out which of the displacement (S), final velocity (V), acceleration (A) and time (T) you have to solve for initial velocity (U).
- If you have V, A and T, use U = V – AT.
- If you have S, V and T, use U = 2(S/T) – V.
- If you have S, V and A, use U = SQRT(V
2
– 2AS).
What is the velocity of the ball?
Conclusion: The magnitude of the velocity of the ball is
26.3 m/s
for the parabolic motion just before it hits the ground and this greater than the 17.1 m/s for the velocity of the ball that falls straight downward. Notice the figure above has the positive y direction upward.
Is the initial velocity always zero?
When a body starts from rest or it changes it direction of motion,it is called as initial velocity. We generally consider
initial velocity is equal to zero
(u=0),only when the object starts from rest. Generally at time (t=0),the initial velocity is zero.
Is V initial velocity?
Final velocity (v) of an object
equals initial velocity (u)
of that object plus acceleration (a) of the object times the elapsed time (t) from u to v.
What units are for velocity?
| Derived quantity Name Symbol | speed, velocity meter per second m/s | acceleration meter per second squared m/s 2 | wave number reciprocal meter m – 1 | mass density kilogram per cubic meter kg/m 3 |
|---|
How do you find velocity with time and height?
Determine how high the projectile traveled above its initial height by using the following formula where V is the initial vertical velocity and T is the time it takes to reach its peak:
Height = V * T +1/2 * -32.2 ft/s^2 *T^2
For example, if you had an initial vertical velocity of 32.14 ft/s and a time of one second, …
What is the final velocity?
Initial and Final Velocity
Initial velocity describes how fast an object travels when gravity first applies force on the object. On the other hand, the final velocity is
a vector quantity that measures the speed and direction of a moving body after it has reached its maximum acceleration
.
Why is initial velocity not zero?
If you choose to start looking when something is already moving, that object will have an initial velocity
that is not zero. For projectiles, as Arturo mentioned, we tend to start looking at an object after it has been launched, and already attained some speed, so it has a non-zero initial velocity.
Is final velocity zero?
People mistakenly think the final velocity for a falling object is zero because objects stop once they hit the ground. In physics problems, the final velocity is
the speed just before touching the ground
. Once it touches the ground, the object is no longer in freefall.
Is initial velocity greater than final velocity?
For ideal conditions,
initial velocity equals final velocity if
, but only if, initial and final elevations (Y) are equal. In fact during flight, the velocity on the way up at a given elevation (Yn) is the same as the velocity on the way down at that same elevation (Yn).
Can initial velocity be negative?
Velocity. … Since the final position of the object (rfinal) may be either positive, negative, or zero, and either larger, smaller, or the same as the initial position (rinitial), the velocity may be positive, negative, or zero. The sign of the velocity depends on the coordinate system chosen to define the position.
Is U final or initial velocity?
| u Initial velocity | v Final Velocity | t time taken | s displacement | a acceleration |
|---|
Is V U at dimensionally correct?
To check the correctness of physical equation,
v = u + at
, Where ‘u’ is the initial velocity, ‘v’ is the final velocity, ‘a’ is the acceleration and ‘t’ is the time in which the change occurs. From (1) and (2) we have [L.H.S.] = [R.H.S.] Hence by principle of homogeneity the given equation is dimensionally correct.
Why is velocity measured in m/s 2?
Because
acceleration is velocity in m/s divided by time in s
, the SI units for acceleration are m/s
2
, meters per second squared or meters per second per second, which literally means by how many meters per second the velocity changes every second. Recall that velocity is a vector—it has both magnitude and direction.
What is velocity in physics class 9?
Velocity: Velocity is
the speed of an object moving in a definite direction
. The SI unit of velocity is also metre per second. Velocity is a vector quantity; it has both magnitude and direction.
