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-1.92 m/s2

Q: If the speed of an object changes from 121 ms to 98 ms during a time interval of 12 s what is the acceleration of the object?

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2.75 m/s

Average acceleration during the time interval = (change on speed) / (time for the change) =(98 - 121) / (12) = -23/12 = negative (1 and 11/12) meters per second2

Using the definition of acceleration as change of speed / time, you basically need to know: * A time interval during which the object accelerates. * The velocity at the beginning of this time interval. * The velocity at the end of this time interval.

Acceleration is equal to the change in velocity over the change in time [a=(vf-vi)/(tf-ti). a=(98m/s - 121 m/s)/(12s)=(-23m/s)/(12s)=-1.92m/s^2

b. -1.92 m/s2Minutes per second is not a unit of velocity. If the question meant meters per second, the answer is correct.

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2.75 m/s

2.75 m/s

Average acceleration during the time interval = (change on speed) / (time for the change) =(98 - 121) / (12) = -23/12 = negative (1 and 11/12) meters per second2

B -1.92 m/s2

Using the definition of acceleration as change of speed / time, you basically need to know: * A time interval during which the object accelerates. * The velocity at the beginning of this time interval. * The velocity at the end of this time interval.

During constant acceleration, either the object's speed changes at a constant rate, or the direction of its motion changes at a constant rate, or both.

Acceleration = (speed at the end of some time interval minus speed at the beginning of the interval)/(length of the time interval)

Acceleration is equal to the change in velocity over the change in time [a=(vf-vi)/(tf-ti). a=(98m/s - 121 m/s)/(12s)=(-23m/s)/(12s)=-1.92m/s^2

Yes, acceleration is the how the velocity changes. This also includes when an object turns

Acceleration

We have this equation: Velocity after = Initial velocity + (acceleration * time) So, let's plug in the numbers into this equation. 98m/s = 121m/s + (acceleration * 12seconds) So, -23 = 12 seconds * acceleration dividing 12 from both sides, the acc. is -1.92m/s/s. (Yes, those are the UNITs of acceleration. And it's negative because the object slows down. )

Acceleration is a direction plus a speed. If either changes then the acceleration changes.