2. [DB Points] DETAILS PREVIOUS ANSWERS A bead slides without friction around a Ioop-theIoop [see figure below). The head is released from rest at a height .h = 3.70R. (a) What is its speed at point @? (Use the following as necessary: the acceleration due to gravity,r g, and R.) If: X (b) How large is the normal force on the bead at point if its mass is 4.?0 grams? direction 3. [-!3 Points] DETAILS A block of mass m = 5.40 kg is released from rest from point and slides on the frictionless track shown in the figure below. [Let ha 2 7.00 m.} (a) Determine the block's speed at points and . VB = E m vC = E m (b) Determine the net work done by the gravitational force on the block as it moves from point to point . :1 4. [-/2 Points] DETAILS MY NOTES ASK YOUR TEACHER PRA A block of mass m = 2.00 kg is attached to a spring of force constant k = 600 N/m as shown in the figure below. The block is pulled to a position x; = 4.70 cm to the right of equilibrium and released from rest. k m *=0 X= X; (a) Find the speed the block has as it passes through equilibrium if the horizontal surface is frictionless. m/s (b) Find the speed the block has as it passes through equilibrium (for the first time) if the coefficient of friction between block and surface is /k = 0.350. m/s