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A rocket ship leaves earth's atmosphere. Its Initial velocity is less than its final velocity. What is this an example of?
Reduced atmospheric drag at higher altitudes, Acceleration due to the thrust of the rocket's engine(s).
When an object's initial velocity is less than its final velocity what does that indicate?
AccelerationWhen the velocity of an object increases or decreases, that means it has accelerated. Acceleration is defined as the rate of change of velocity.If an object's final velocity is greater than its initial velocity, that indicates positive acceleration. If an object's final velocity is less than its initial velocity -- if, say, it slows down and comes to a stop -- then that indicates negative acceleration. Deceleration is another way of saying negative acceleration. But . . .It is good idea to avoid using the term deceleration, because an object that is experiencing negative acceleration may slow down, come to a stop momentarily, and then reverse direction and speed up -- IN THE OPPOSITE DIRECTION!You can think of it this way: When an object is slowing down, its acceleration is in the direction opposite to its motion. We think of that as negative acceleration.
How do you find work given mass initial velocity and final velocity?
We assume you mean the work done in order to change the velocity of the moving mass.Easiest way is to calculate the change in the kinetic energy of the moving mass, and realizethat it's equal to the amount of work either put into the motion of the mass or taken out of it.Initial kinetic energy = 1/2 m Vi2Final kinetic energy = 1/2 m Vf2Change in kinetic energy = 1/2 m ( Vf2 - Vi2)
Will a ball drop rest reach the ground quicker than the one lunched from the same height but with and initial horizontal velocity?
No. What counts in this case is the vertical component of the velocity, and the initial vertical velocity is zero, one way or another.
What is dimensional equation?
A dimensional equation is one in which the units of measurement and their powers are used rather than their actual numeric values. For example, consider an object under constant acceleration: let u denote its initial velocity v denote its final velocity a the acceleration and t the time between the initial and final points of time. Then v = u +at The dimensional equation is [LT-1] = [LT-1] + [LT-2][T] L represents a dimension of length T represents a dimension of time M, which does not appear here, would represent mass. Only terms with the same dimensions may be added or subtracted.
