Everything Science Grade 12

(Marvins-Underground-K-12) #1

CHAPTER 8. WORK, ENERGY AND POWER 8.3


resources, listing advantages and disadvantages of each type. Writeup the
results as a short report.

Exercise 8 - 2



  1. Fill in the table withthe missing informationusing the positions of the ball in the
    diagram below combined with the work-energytheorem.


A


B C


D E


G F


position KE PE v
A 50 J
B 30 J
C
D 10 J
E
F
G


  1. A falling ball hits theground at 10 m·s−^1 in a vacuum. Would the speed of the
    ball be increased or decreased if air resistance were taken into account.Discuss
    using the work-energy theorem.

  2. A pendulum with mass 300g is attached to the ceiling. It is pulled upto point A
    which is a height h = 30 cm from the equilibrium position.

Free download pdf