Work is done when a motion resulted from the force being done by an object. The amount of work done is calculated by multiplying the force applied and the distance traveled. It is calculated as follows:
Work = Force x distance = 280 N x 5 m = 1400 J.
To solve the problem you must first know that by keeping the linear moment P1 = P2. You must find P1 from the system and equal it to P2 of the system, from that equation you clear the final velocity 1. Which will result in V1f = 60.16 cm / s to the north.I attach the solution.
The ratio of their amplitudes will be 2.41.
To find the answer, we have to know more about the simple harmonic motion.
<h3>How to find the ratio of their amplitudes?</h3>

- We have the relation between these quantities and amplitudes as,

- Here, for both the oscillation, k will be same.
- Thus, the ratio of amplitude will be,

Thus, we can conclude that, the ratio of their amplitudes will be 2.41.
Learn more about simple harmonic motion here:
brainly.com/question/22422926
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Answer:
B.7.5m/s2
Explanation:
average acceleration=change invelocity/time taken
a=(60-30)/4
=7.5m/s2
When two atoms of the same nonmetal react,they form what we know today as a diatomic molecule.
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