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A train is accelerating at a rate of 2.0kmhrs If its initial velocity is 20kmhr what is its velocity after 30seconds?
Wiki User
∙ 11y ago
Convert 3km/hr2 to km/s2 and 30 km/hr to km/s and apply the equation v f = v o + at and convert the answer to km/hr if desired.
Wiki User
∙ 16y ago
Wiki User
∙ 11y agofirst i also messed up with this question but the answer is 80m/s
20{2* 30} =
80m/s
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What does vf mean in a science equation?
final velocity. it is used in multiple equations. its opposite would be vi, initial velocity. they mean exactly what they sound like. final velocity is the last velocity something was going at in the measured time, initial would be the very first velocity at a measured time.
State in words how acceleration is calculated?
There are two methods, it depends on what variables you have: 1. Subtract the initial velocity from the final velocity and divide that whole term by the time (Vf- Vi)/t = a 2. Square both the initial velocity and the final velocity and subtract the squared inital velocity from the squared final velocity and that answer by two times the distance (Vf^2 - Vi^2)/2d = a
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
What is the total displacement of the car after 5 h?
0 km=============================You must specify the initial velocity if any acceleration was there or not.
Is it possible that a particle has zero velocity but still have a acceleration?
If the velocity equals zero, the acceleration is also zero because the velocity hasn't changed, thus, the particle isn't accelerating anywhere. This is not exactly true; at an instant in time the acceleration can be non-zero while the velocity is zero. However, this would change the velocity to non-zero after any amount of time. An example of this is when you throw a ball into the air: at it's highest point, the velocity is zero (it changes from going upward to going downward, passing through zero for an instant). However the acceleration is downward the entire time.
If final velocity is greater than initial velocity an object is?
Accelerating...or was accelerating.
If an object is accelerating what equation relates the distance traveled by that object to the initial velocity final velocity and time?
Final velocity = Initial velocity +(acceleration * time)
If an object is accelerating what equation relates the acceleration of that object the initial velocity and the final velocity and time?
Vf = Vi + at Where Vf = final velocity Vi = initial velocity a = acceleration t = time
What is the formula used to calculate the accelerating?
A=Vf-Vi/t Acceleration is the final velocity minus the initial velocity divided by the time it too to reach it
Can the effect of initial velocity on final velocity be predicted?
Well, (final velocity) = (initial velocity) + (acceleration x time)
What does initial velocity means?
initial velocity is the velocity with which a particle starts its journey.
Total initial momentum of two objects?
That may vary, depending on the initial velocity and mass.That may vary, depending on the initial velocity and mass.That may vary, depending on the initial velocity and mass.That may vary, depending on the initial velocity and mass.
What is the formula for calculating final velocity when you know the initial speed and the acceleration?
the formula for finding acceleration is final velocity, minus initial velocity, all over time. So if you have the acceleration and initial speed, which is equal to the initial velocity, you must also have time in order to find the final velocity. Once you have the time, you multiply it by the acceleration. That product gives you the difference of the final velocity and initial velocity, so then you just add the initial velocity to the product to find the final velocity.
What is the formula for calculating displacement in which initial velocity and time are the variables?
If the velocity is constant, thenDisplacement = (initial velocity) multiplied by (time)
What is initial velocity?
Initial velocity is the original starting velocity. I love math! It makes you smart like a math smart person.
What is the balloons initial velocity when a water balloon is dropped from the fifth floor of a building?
If you simply release an object, the initial velocity is always zero.
What is acceleration of a body moving with uniform velocity?
zero because the initial and final velocity is constant . so,difference bet. final velocity and initial velocity is zero
