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**Physics question, need help A.S.A.P.!!**

What force is needed to accelerate a child on a sled (total mass = 61.0 kg) at 1.12 m/s2?

- Thread starter Rapta3
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- #1

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What force is needed to accelerate a child on a sled (total mass = 61.0 kg) at 1.12 m/s2?

- #2

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If the coefficient of kinetic friction between a 37 kg crate and the floor is 0.25, what horizontal force is required to move the crate at a steady speed across the floor?

What horizontal force is required if µk is zero?

- #3

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FORCE = MASS x Acceleration.

- #4

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to move it at a steady speed what is the sum of the forces? Another way of putting this question is what is the acceleration on the sled is the speed is CONSTANTRapta3 said:

If the coefficient of kinetic friction between a 37 kg crate and the floor is 0.25, what horizontal force is required to move the crate at a steady speed across the floor?

What horizontal force is required if µk is zero?

Once you figure that out what is the sum of the forces (applied and friction)?

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- #6

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Is 73.2 N the correct answer for my first question?

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Help!!! Cmon!!

- #8

vsage

Yes you're right on the first one. For the second one, the force required is = [tex]\mu_s m g[/tex]

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- #10

vsage

- #11

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No thats the complete question....

- #12

vsage

I didn't do the calculation but it looked right. You're off by 5N. 1.12*61 != 73.2

- #13

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thats what i said, look above i got 73.2

Last edited:

- #14

vsage

I help with math and physics, not arithmetic, sorry :(Rapta3 said:thats why i said, look above i got 73.2

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Ok someone help me with my second question, plz

- #16

vsage

- #17

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Ok thank you.

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If it is what you say it is, it should be .25, but its not so what else is missing?

- #19

vsage

- #20

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Ok well thanks for everything... time for some sleep, ill talk to guys later, bye.

- #21

vsage

You're welcome. Glad to hear we helped you out some.

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