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A dockworker applies a constant horizontal force of 89.0N to a block of ice on a smooth horizontal floor. The frictional force is negligible. The block starts from rest and moves a distance 12.5m in a time 5.10s .

A)What is the mass of the block of ice?

B)If the worker stops pushing at the end of 5.10s , how far does the block move in the next 5.30s ?

2. Homework Equations : F=ma

3. The Attempt at a Solution : well i was able to solve part A by using the equation

deltaD=(v1+v2)/deltaT to find v2. and then i used a=(v2-v1)/deltaT and plugged it into F=ma to find the mass.

For part B, i tried using the same equation for finding distance, however it could not be done cause i do not know how to find v2, and if i plug in 0 as v2, i get a wrong answer.

so basically i need help in solving part B of this problem. thanks.

A)What is the mass of the block of ice?

B)If the worker stops pushing at the end of 5.10s , how far does the block move in the next 5.30s ?

2. Homework Equations : F=ma

3. The Attempt at a Solution : well i was able to solve part A by using the equation

deltaD=(v1+v2)/deltaT to find v2. and then i used a=(v2-v1)/deltaT and plugged it into F=ma to find the mass.

For part B, i tried using the same equation for finding distance, however it could not be done cause i do not know how to find v2, and if i plug in 0 as v2, i get a wrong answer.

so basically i need help in solving part B of this problem. thanks.

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