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velocity of the object changes at a constant rate as it covers a distance over time. Learning Task 1- Let us practice: Identify if the scenario is uniform motion (UM) or uniform acceleration (UA). Only write the acronym on the space provided. Afterward, provide an explanation for your answer. UM or UA Why?
1. A ball is rolling on a level ground and moves at a speed of 5m/s before it stops.
2. A car is facing a heavy traffic and must constantly decrease its speed every 5 minutes. 3. The fan blades move at a rate of 260 rotation per minute when you set in number 1.


pls pa answer ​

Sagot :

Marcramosp11idn

Answer:

Uniform Acceleration

Acceleration that does not change in time is called uniform or constant acceleration. The velocity at the beginning of the time interval is called initial velocity,

vi

, and the velocity at the end of the time interval is called final velocity,

vf

. In a velocity versus time graph for uniform acceleration, the slope of the line is the acceleration. The equation that describes the curve is

vf=vi+at

.

Example 1

If an automobile with a velocity of 4.0 m/s accelerates at a rate of 4.0 m/s2 for 2.5 s, what is the final velocity?

vf=vi+at=4.0 m/s+(4.0 m/s2)(2.5 s)=4.0 m/s+10. m/s=14 m/s

Example 2

If a cart slows from 22.0 m/s with an acceleration of -2.0 m/s2, how long does it require to get to 4 m/s?

t=vf−via=−18 m/s−2.0 m/s2=9.0 s

Use the simulation below to further explore the uniform acceleration of a cliff diver. Observe the relationship between position, velocity, and acceleration as the diver falls under the influence of gravity. Begin by turning off the air resistance and see what happens when the diver falls as if he is in a vacuum. Then, if you are up for a challenge, turn the air resistance on and consider its effects on the diver.

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