7.4 N 1.7 kg H = 0.34
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Please find Work done by tension (J), Work lost to friction (J), and speed of box (m/s).
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- The 15-kg bar is released from rest while in the position shown and its end rollers travel in the vertical-plane slot shown. If the speed of roller A is 3.23 m/s as it passes point C, determine the work done by friction on the system over this portion of the motion. The bar has a length 1 = 775 mm. Assume 8 = 34⁰ Answer: Utriction B C N-mDP-1 A 7.50kg box is pushed 1.70m along a frictionless horizontal table top by a constant force directed below as shown to the right. The work done by P is 25.0J. Find the angle 8 between the force P and the horizontal. P=20.0N Table top Ax 1.70m1 7.50kgAn object moves a distance 71 m when a force of 54 N is applied in that same direction. Calculate the work done by the force on the object as it moves. W = O Search CO J B.
- A block of mass 2.7 kg is pushed 2.6 m along a frictionless horizontal table by a constant 21 N force directed 32 degrees below the horizontal. d) Determine the work (in J) done by the force of gravity. e) Determine the work (in J) done by the net force on the block.A 7.80-g bullet moving at 590 m/s penetrates a tree trunk to a depth of 5.60 cm. (a) Use work and energy considerations to find the average frictional force that stops the bullet. N=(b) Assuming the frictional force is constant, determine how much time elapses between the moment the bullet enters the tree and the moment it stops moving. s=