A baseball is traveling (+20 m/s) and is hit by a bat. It leaves the bat traveling (-30 m/s). What is the change in the velocity
2 answers:
Answer: A. 50m/s
Explanation
Step 1
The first step is to define velocity. Velocity is a measure of how fast displacement is changing with time. When discussing the velocity of a object we have to take into account that direction is important.
Step 2
The second step is to calculate the change in velocity. The object is initially travelling with a velocity of and then hits the bat, changes directions and travels at
in a direction opposite to it's initial direction. The change in velocity is calculated as shown below,
The correct answer is
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Answer:
A 5
Explanation:
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This is why we see that in the electromagnetic spectrum, radio waves have the least energy because they have the longest wavelength.