The sum of kinetic energy and potential energy within a system is called
2 answers:
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Answer:
kinetic energy of glider = -0.376 j
Explanation:
Original distance by which the spring is compressed can be determine by using law of conservation of energy (As spring slide from glider, it gain some potential energy. On the top of track there is glider’s potential energy exist)
where x is compressed distance by spring
height of track is calculated as
where l is distance covered by glider, theta angle is the angle of inclination of track
therefore, we have formula for x as
x = 0.039 m
kinetic energy of glider = potential energy by spring - potential energy at 1.50 distance
kinetic energy of glider = -0.376 j
Answer:
<em>The skydiver needs 0.71 seconds to reach 7 m/s</em>
Explanation:
<u>Free Fall Motion </u>
When an object is dropped in free air (no friction) from a certain height h, it follows a free-fall motion, whose acceleration is due exclusively to gravity. The speed at a moment t when the object is dropped (from rest) is:
We need to find How long does the skydiver needs to reach 7 m/s. We solve for t
The skydiver needs 0.71 seconds to reach 7 m/s