U (J) B x (m) 10 2 4 6 8 -2 -4 Figure P7.38 E,

I need help with part D!!

You drop a 1.50 kg book to a friend who stands on the ground at distance D= 12.0 m below. If your friend's outstretched hands are at distance d = 1.30 mabove the ground (see the figure), (a) how much work W, does the gravitational force do on the book as it drops to her hands? (b) What is the change AU in the gravitational potential energy of the book-Earth system during the drop? If the gravitational potential energy Uof that system is taken to be zero at ground level, what is U (c) when the book is released and (d) when it reaches her hands? Now take U to be 100 J at ground level and again find (e) W, (f)AU. (g) U at the release point, and (h) U at her hands. (a) Number Units (b) Number Units (c) Number Units (d) Number Units (e) Number Units (f) Number Units (g) Number Units (h) Number Units >

A potential energy function for a system in which a two-dimensional force acts is of the form U = 3x5y − 2x.  Find the force that acts at the point (x, y). (Use the following as necessary: x and y.) F =

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A child of mass m = 16 kg slides down a slide of height h = 2.7 m without friction. Let gravitational potential energy be zero at ground level. a)Write an expression for the child's total mechanical energy, E, at the top of the slide, in terms of the variables in the problem and the acceleration due to gravity g.  b)Calculate the change in the child's potential energy, ΔU in joules, from the top to the bottom of the slide at ground level (i.e. ΔU = Uground - Utop).  c)What is the child's final speed, vf in m/s?

A person secures a 4.8-m-long rope of mass 0.46 kg at one end and pulls on the rope, exerting a 124-N force. The rope vibrates in three segments with nodes separating each segment. Correct Part D Determine the frequency of vibration. Express your answer with the appropriate units. 0 f = 0.23 Submit Hz wwwww. Previous Answers Request Answer X Incorrect; Try Again; 4 attempts remaining

The force required to compress a non-standard spring as a function of displacement is given by the equationF(x) = -Asin(bx) + kx,where A = 25 N, b = 11 rad/m, and k = 68 N/m. Enter a general equation in terms of the given variables for the work required to compress this spring from position x1 to x2.  Calculate the work done in joules as the spring is compressed from x = 0 to x1 = 21 cm.   Calculate the work done in joules as the spring is compressed from x1 = 21 cm to x2 = 66 cm

You drop a 2.50 kg book to a friend who stands on the ground at distance D-13.0 m below. If your friend's outstretched hands are at distance d-1.60 m above the ground (see the figure), (a) how much work W, does the gravitational force do on the book as it drops to her hands? (b) What is the change AU in the gravitational potential energy of the book-Earth system during the drop? If the gravitational potential energy U of that system is taken to be zero at ground level, what is U (c) when the book is released and (d) when it reaches her hands? Now take U to be 100 J at ground level and again find (e) W. (f) AU, (g) U at the release point, and (h) U at her hands. 10000 El

The figure shows four situations where a force F is applied to the same block. In each case the force has the same magnitude, and the displacement of the block in each case is the same (marked as Delta(x)) - to the right with the same magnitude.Rank the four situations in order of the work done by the force F on the block, from most positive to most negative. A) c,a,d,b B) b,d,a,c C) The Force does the same work on the block in all four situations. D) C,b,a,d