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tangare [24]
3 years ago
10

Two workers are sliding 490 kg crate across the floor. One worker pushes forward on the crate with a force of 410 N while the ot

her pulls in the same direction with a force of 260 N using a rope connected to the crate. Both forces are horizontal, and the crate slides with a constant speed. What is the crate's coefficient of kinetic friction on the floor?

Physics
2 answers:
san4es73 [151]3 years ago
6 0

Answer:

μ=0.16

Explanation:

Mass of crate = 490 kg

Pushing force = 410 N

Pulling force = 260 N

Lets coefficient of friction =μ

The normal force,N= mg

N= 490 x 9.81 =4806.9 N

We know that friction force(fr)

fr= μ m g

fr =4806.9 μ

The total horizontal force F

F= 410 + 260

F=670 N

For sliding condition the maximum friction force will be equal to total horizontal force

F=fr

670 = 4806.9 μ

μ=0.16

So the coefficient of friction is 0.16.

solmaris [256]3 years ago
5 0

Answer:

\mu = 0.14

Explanation:

There are two forces acting on the box to slide it over the horizontal surface

1) F_1 = 410 N in forward direction

2) F_2 = 260 N in forward direction

now it is given that box is moving with constant speed so net force on the box must be zero

F_1 + F_2 - f = 0

so we will have

410 + 260 - f = 0

f = 670 N

now by the formula of friction force we know that

f = \mu mg

670 = \mu (490 \times 9.81)

\mu = 0.14

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