just Q11 11. You are looking down form above on three identical sticks lying on

Question

just Q11 11. You are looking down form above on three identical sticks lying on a table. The same force F is applied to each: Compare the accelerations of the center of mass of each stick: 12. A conservative force has its greatest positive x-component F, where : (1) The potential energy of 1 4-kg particle is given by U(x,y,z)=(5N/m)x^2-(4 N/m^2)y^3. The particle is released from at the point (x0,y0,z0)=(0,+2 m,0). What is its speed after traveling a distance of 5 m? (Hint: In which direction will the object move?)

Explanation / Answer

11. Fnet = a_cm / m
a_cm = Fnet / m
F is same and m is also same
then , a_cm = A1 = A2 =A3

12 . U(x) = integral of f(x)
F(x) = - partial diff. U/dx
ans. (e)

1) U( 0 . 2 . 0 ) - U ( 0 , 7 .0) = mv^2 /2
0 - 4(2)^3    + 4 (7)^3 = 4v^2 /2
v = 25.88 m/s

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