A certain spring is found not to obey Hooke's law, it exerts a restoring force F.(z) = -az - Bz if it is stretched or compressed, where a = 60.0 N/m and B= 18.0 N/m?. The mass of the spring is negligible. • Part A Calculate the potential energy function U(z) for this spring. Let U=0 when z0. Express your answer in terms of z. ? U(z) = Submit Request Answer • Part B An object with mass 0.900 kg on a frictionless, horizontal surface is attached to this spring. pulled a distance 1.00 m to the right (the +z- direction) to stretch the spring, and released. What is the speed of the object when it is 0.50 m to the right of the z =0 equilibrium position? Express your answer in meters per second. ? v2 = m/s Submit Reguest Answer KReturn to Assignment Provide Feedback

Computation. 46 J of work is required to stretch an ideal spring from 1.5 m beyond its rest length to 3.1 m beyond its rest length. Calculate its spring constant, k. k N/m Record your numerical answer below assuming three significant figures. Remember to include a "-" if necessary. (C ^63 10:51 PM 10/23/2022 X ¦

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?

H, Please explain and answer this question for me:thank you! Why does the shape of the ramp not affect the Total Energy in the non-friction case and Why does the shape of the ramp affect the Total Energy in the friction case?

A 79 kg bike racer climbs a 1400-m-long section of road that has a slope of 4.3° Part A By how much does his gravitational potential energy change during this climb? Express your answer with the appropriate units. AU = O μÅ Value Units ?

Can you please explain the logic behind this answer? Intuition tells me it would be answer choice A.

A 1.2 kg rock is pressed up against a spring with spring constant 30 N/m and then released, causing it to slide across a frictionless horizontal surface and then to slide up a frictonless incline to a height of 20 cm. (a) Fill out the Energy Chart below to calculate the Potential and Kinetic Energy at each time point. Use g = 10 m/s? for easier calcuations. Assume Energy is Conserved throughout the problem. Scene C Scene A Scene B h3D 20 ст- Ax h = 0 Scene A Scene B Scene C | (b) What is the initial compression of the spring, Ax? PEgravity = mgh КЕ = }mv² PEspring = }k(Ax)² 2.

(Figure 1) is the force-versus-position graph for a particle moving along the x-axis. Figure Fx (N) 4 2 0 -2 -4 1 2 3 -x (m) ▼ Part A Determine the work done on the particle during the interval 0-1 m. Express your answer with the appropriate units. Wo-1 = Units You have already submitted this answer. Enter a new answer. No credit lost. Try again. Submit Part B ΠΑ W1-2 = Submit Value Previous Answers Request Answer Determine the work done on the particle during the interval 1-2 m. Express your answer with the appropriate units. μA Value Units ? www Previous Answers Request Answer ? Units input for part B

need help with A-f