Question

The next three questions pertain to the following situation. 12) Box A of mass MA = 5 kg is suspended by a massless cord over a massless pulley and connected to a second box B that sits on an incline. The incline is at an angle of 30 degrees with the horizontal, as shown in the figure. If the boxes are resting in equilibrium, with neither moving up or down, what is the mass of box B, assuming that there is no friction between it and the surface on which it sits? a) 5.00 kg b) 5.77 kg c) 10.00 kg 13) Now assume that box B is replaced by a box with unknown mass MB and coefficient of kinetic friction ?k = 0.2. This new box is observed to accelerate up the ramp at 5 m/s². What is the tension in the string as the block accelerates up the ramp? a) T = 20 N b) T = 24 N c) T = 49 N 14) Calculate the mass MB of the new block B. a) MB = 0.5 kg b) MB = 1 kg c) MB = 2 kg d) MB = 5 kg e) MB = 10 kg

          The next three questions pertain to the following situation.
12) Box A of mass MA = 5 kg is suspended by a massless cord over a massless pulley and connected to a second box B that sits on an incline. The incline is at an angle of 30 degrees with the horizontal, as shown in the figure.
If the boxes are resting in equilibrium, with neither moving up or down, what is the mass of box B, assuming that there is no friction between it and the surface on which it sits?
a) 5.00 kg
b) 5.77 kg
c) 10.00 kg

13) Now assume that box B is replaced by a box with unknown mass MB and coefficient of kinetic friction ?k = 0.2. This new box is observed to accelerate up the ramp at 5 m/s². What is the tension in the string as the block accelerates up the ramp?
a) T = 20 N
b) T = 24 N
c) T = 49 N

14) Calculate the mass MB of the new block B.
a) MB = 0.5 kg
b) MB = 1 kg
c) MB = 2 kg
d) MB = 5 kg
e) MB = 10 kg

The next three questions pertain to the following situation.
12) Box A of mass MA = 5 kg is suspended by a massless cord over a massless pulley and connected to a second box B that sits on an incline. The incline is at an angle of 30 degrees with the horizontal, as shown in the figure.
If the boxes are resting in equilibrium, with neither moving up or down, what is the mass of box B, assuming that there is no friction between it and the surface on which it sits?
a) 5.00 kg
b) 5.77 kg
c) 10.00 kg

13) Now assume that box B is replaced by a box with unknown mass MB and coefficient of kinetic friction ?k = 0.2. This new box is observed to accelerate up the ramp at 5 m/s². What is the tension in the string as the block accelerates up the ramp?
a) T = 20 N
b) T = 24 N
c) T = 49 N

14) Calculate the mass MB of the new block B.
a) MB = 0.5 kg
b) MB = 1 kg
c) MB = 2 kg
d) MB = 5 kg
e) MB = 10 kg

Added by Mary S.

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