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Figure 13 shows a frictionless trolley of mass 2 kg moving with uniform velocity towards a wall.

      

Figure 13 shows a frictionless trolley of mass 2 kg moving with uniform velocity towards a wall. At the front of the trolley is a spring whose spring constant is 25 Nm-1. The trolley comes to rest momentarily after compressing after compressing the spring by 3 cm and the rebounds from the wall.
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(i) Determine
(I) The force exerted on the wall by the spring.
(II) The maximum acceleration of the trolley as it rebounds from the wall.
(ii) State the reason why the trolley acquires a constant velocity after it rebounds

  

Answers


John
(i) (I) F =ke = 25 x 0.03 = 0.75 N.

(II) F = ma = 0.75 = 2a = a = 0.375 m/s2

(ii) Force in spring decreases as spring recovers original length. No force on trolley after contact with is lost
johnmulu answered the question on May 16, 2017 at 06:17


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