A pogo stick has using only the energy in the spring if the child and stick have

Question

A pogo stick has using only the energy in the spring if the child and stick have a total mass of 36.5 kg? a spring with a force constant of 2.98 x10* N/m which can be compressed 15.6 cm. To what maximum height can a child jump on the stick Question 7 2 pts How much work does a supermarket checkout attendant do on a can of soup that he pushes 0.42 m horizontally with a force of 3.7 N? Question 8 2 pts Find the time taken for a skier in a downhill ski race who skies 85 m along a 15.3° slope neglecting friction if he or she starts from rest

Explanation / Answer

6.

By conservation of energy

mgh = (1/2)Kx2

36.5*9.81*h =(1/2)*(2.98*104)*0.1562

h=1.013 m

7.

Work done

W=Fd=3.7*0.42

W=1.554 J

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