NLM & FBD

What is the scale reading (in N) in each

What is the weight of a 60-kg astronaut on the moon where g is 1/6 of the g on earth?

• 100N

• 10N

• 3600N

• 600N

find the tension

• 40 N

• 25N

• 30N

• 20N

    A 2000-kg elevator is supported by a steel cable. Find the tension in the cable when the empty elevator is  

          a) descending at a constant speed, b) descending and slowing down at a rate of 2m/s² ?

• 1) 20000N, 2) 24000N

• 1) 2000N, 2) 2400N

• 1) 2500N, 2) 24000N

• 1) 200N, 2) 24000N

   Find the tension in each string and the acceleration of the 3-box system on the right if there is no friction.  

• 13N, 35N

• 28N, 13N

• 28N, 35N

• 13N, 28N

    Find the tension in each string and the acceleration of the 3-box system on the right if the µ_k between the 5kg and the table is 0.1.  

• 32N, 0N

• 13N, 28N

• 12.5 N 30 N

     The system on the left starts to move after being  released from rest. Find the tension in the string  

AND the acceleration of the blocks when a) there is no friction, b) the coefficient of kinetic  friction between the 4kg block and the incline is 0.1.

• 1) a= 1.43m/s^2, T= 25.N

  2) a= 0.934m/s^2 T= 27.2N

• 1) a= 1.43m/s^2, T= 25.N

  2) a= 0m/s^2 T= 27.2N

• 1) a= -1.43m/s^2, T= 25.N

  2) a= -0.934m/s^2 T= 27.2N

Find T₁ , T₂, and T₃ in the system on the right.  

• 12.5N, 12.5N , -20 N

• 12.5N, 12.5N , 20 N

• 12.5N, 20 N, 12.5N

• 12.5N, 1N , 2 N