You hold a uniform, 26.0-g pen horizontal with your thumb pushing down on one end and your index finger pushing upward 3.2 cm from your thumb. The pen is 13.9 cm long.

Question

Find the two forces.

Force of Finger (Answer: 0.553N)

Force of Thumb (Answer: 0.299N)

Answers are provided above. Please show all work on how to get the answers.

Answer 1

13.9cm / 2 = 6.95cm

F(finger) 0.026kg * 9.8m/s^2 * 6.95cm / 3.2cm = 0.553N

F(thumb) 0.553N - 0.026kg * 9.8m/s^2 = 0.299N