How does a car’s average speed differ from its instantaneous speed?
2 answers:
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The new acceleration is c) 18m/s/s
Explanation:
Net force, mass and acceleration of an object are related by Newton's second law of motion:
where
F is the net force on the object
m is its mass
a is its acceleration
In the first trial of this problem, a net force of is applied to the object, causing an acceleration of
Calling the mass of the object 'm', this means that
[N] (1)
In the second trial, the force applied is , so we have
where a' is the new acceleration. Substituting (1) into the second equation, we find:
This is because the acceleration is directly proportional to the force applied: therefore, if the force applied doubled, the acceleration doubles as well.
Learn more about Newton's second law:
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