If it requires 4.5 J of work to stretch a particular spring by 2.3 cm from its equilibrium length, how much more work will be required to stretch it an additional 3.5 cm

Explanation:

Given:

We know the work done in stretching the spring is given as:

where:

k = stiffness constant

Now the work done in stretching the spring from equilibrium to ():

So, the amount of extra work done:

the total distance traveled by the car is

30km + 49km = 79 km .

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