mechanics | Revision Server | Page 1

glass ocean May 4, 2025, 1:58 PM

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can someone do part b through considering the forces acting on the block of 4kg please?

fathom lotus May 4, 2025, 2:24 PM

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glass ocean May 4, 2025, 2:25 PM

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thank you

fathom lotus May 4, 2025, 2:25 PM

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hopefully that’s right basically when F is greater than 30 net force on 4kg block will be F-T and when F is less than 30 net force on 4kg block will be T-F

glass ocean May 4, 2025, 2:26 PM

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i realised my mistake

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yep youre fully correct

fathom lotus May 4, 2025, 2:26 PM

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np

haughty cedar May 4, 2025, 2:50 PM

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fathom lotus

where did you get 10 and 50 from?

fathom lotus May 4, 2025, 2:52 PM

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haughty cedar where did you get 10 and 50 from?

part a) i just treat the whole thing as one block and for 1st case 30-F=ma and second case F-30=ma tension is ignored if you treat it as one block

haughty cedar May 4, 2025, 2:53 PM

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I dont get case 2

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OH WAIT

fathom lotus May 4, 2025, 2:53 PM

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case 2 is if F is greater than 30

haughty cedar May 4, 2025, 2:53 PM

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are you assuming case 1 accelerations going right

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case 2 acceleration's going left

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?

fathom lotus May 4, 2025, 2:53 PM

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yes

haughty cedar May 4, 2025, 2:53 PM

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oh ok ty

fathom lotus May 4, 2025, 2:53 PM

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basically if it’s left F is greater than 30 and vice versa

haughty cedar May 4, 2025, 2:54 PM

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yh

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tysm

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