1) A building is about 336 m high. Find by energyconsiderations the kinetic ener

Question

1) A building is about 336 m high. Find by energyconsiderations the kinetic energy of a 10kg object after it hasfallen 100 m from this building. 2) A glider of 500g is 10cm above the table at the beginningof its motion and 6cm above the table at the end. What is thetheoritical value of kinetic energy at the bottom? The initialvelocity of the glider is 20cm/s down the air tract. 1) A building is about 336 m high. Find by energyconsiderations the kinetic energy of a 10kg object after it hasfallen 100 m from this building. 2) A glider of 500g is 10cm above the table at the beginningof its motion and 6cm above the table at the end. What is thetheoritical value of kinetic energy at the bottom? The initialvelocity of the glider is 20cm/s down the air tract.

Explanation / Answer

kinetic energy = lost potential energy . KE = m g h   = 10 * 9.80 *100 =    9800 Joules . . initial KE + initial PE = finalKE + final PE . (1/2) *0.500 * 0.202  + 0.500 * 9.80 * 0.10   = Final KE +  0.500 * 9.80 * 0.06 .              0.01      +   0.49    =    KE    +     0.294 . KE =   0.206   Joules

Related Questions

Navigate

• Browse (All)
• Browse 1
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.