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Jet001 [13]
3 years ago
9

What force must the worker exert to get the box moving & what force must the worker exert to accelerate the box at 0.1 meter

s per second squared to the south?

Physics
1 answer:
photoshop1234 [79]3 years ago
3 0

Since static friction is the minimum force required to just start the motion of a stationary object.

Here if we need to start an object from rest then we required F = 700 N

So for the first part of the above problem Force will be F = 700 N

Now if the box is already moving then we will have to use kinetic friction force between box and floor

now we can write the equation of net force as

F - F_k = m*a

here

F_k = kinetic friction = 220 N

m = mass = 500 kg

a = acceleration = 0.1 m/s^2

now we will have

F - 220 = 500* 0.1

F = 220 + 50 = 270 N

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First, we convert the distance from km/h to m/s

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