Question

A simple pendulum 2 m long has a bob
of mass 0.5 kg which is 1 m above the
floor at it's lowest point. The bob is
pulled aside until it is 1.1 m,above the
floor. It's change in potential energy is
A
49 J
B
49 x 104
С
0.49 J
D
26 J.​

Answer 1

Step-by-step explanation:

answer (c) 0.49J

its change in potential energy

Answer 2

Answer:

W1 = mgh = 0.5 × 9.8 × 1 = 4.9

W2 = mgh = 0.5 × 9.8 × 1.1 = 5.39

W = W2 - W1 = 5.39 - 4.9 = 0.49

Therefore the change in PE is 0.49