A group of students observes that a wooden block (m = 0.40 kg) on the end of a string with a radius of 0.7 meters makes 14 rotations in 20.7 seconds when twirled. Part A Calculate the centripetal acceleration of the wooden block: a = 2.55 m s2 Submit Previous Answer Request Answer Incorrect; Try Again; 4 attempts remaining Part B Calculate the tension in the string acting on the wooden block: TT = 1.02N

Question

Physics

Semaj Khan

28 February, 08:19

A group of students observes that a wooden block (m = 0.40 kg) on the end of a string with a radius of 0.7 meters makes 14 rotations in 20.7 seconds when twirled. Part A Calculate the centripetal acceleration of the wooden block: a = 2.55 m s2 Submit Previous Answer Request Answer Incorrect; Try Again; 4 attempts remaining Part B Calculate the tension in the string acting on the wooden block: TT = 1.02N

+1

Answers (1)

Know the Answer?

Giggles · Answer 1

1.02 N

Explanation:

mass of block, m = 0.40 kg

radius, r = 0.7 m

14 rotations in 20.7 second

Centripetal acceleration, a = 2.55 m/s^2

The tension in the string is same as the centripetal force

T = mass x centripetal acceleration

T = 0.4 x 2.55 = 1.012 N