003 (part 1 of 2) 10.0 points An air puck of mass 0.026 kg is tied to a string a

Question

003 (part 1 of 2) 10.0 points An air puck of mass 0.026 kg is tied to a string and allowed to revolve in a circle of radius 1.4 m on a frictionless horizontal surface, The other end of the string passes through a hole in the center of the surface, and a mass of 2.0 kg is tied to it, as shown. The suspended mass remains in equilibrium while the puck revolves on the surface 0.026 kg 1.4 m What is the magnitude of the force that ck? The acceleration due to gravity is 9.81 m/s2 . maintains circular motion acting on the pu Answer in units of N 004 (part 2 of 2) 10.0 points What is the linear speed of the puck? Answer in units of m/s 005 10.0 points Find the magnitude of the torque produced by a 3.1 N force applied to a door at a per

Explanation / Answer

Q3)

Part-1:

Let

M = Mass suspended

Magnitude of force that maintains circular motion:

T = M g

   = 2 * 9.81

   = 19.62 N

Q4)

Part - 2:

Let

m = Mass revolving in circle

Acceleration:

a = F / m

   = 19.62 / 0.026

   = 754.6 m/s^2

Velocity:

a = v^2 / r

v = sqrt (ar)

   = sqrt ( 754.6 * 1.4 )

   = 32.5 m/s

Q5)

Magnitude of torque = Force * Perpendicular distance

                                 = 3.1 * 0.39

                                 =1.21 N.m

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