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Maths AS mechanics help

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Reply 1
How would I do this, so far I have added the bucket and the brick to get 700g and multipllied this by 0.3 to get 210N (F=ma)
Original post by Mya_oty
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What have you tried?

The first thing you'd want to do is convert grams into kg, and also draw a diagram with labelled forces.
Reply 3
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Original post by Mya_oty
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Not quite.

If the man exerts a force F to bring the bucket up with a brick inside it, then by N2L we have FMg=MaF-Mg = Ma where MM is the combined mass of the brick and the bucket. You have g=10g=10 and a=0.3a=0.3.
Reply 5
So have I just worked out the force for the brick and bucket?
Original post by Mya_oty
So have I just worked out the force for the brick and bucket?


Yes.

For the force exerted on the brick by the bucket, you need to consider the brick on its own. What forces are acting on it?
Reply 7
Gravity + acceleration?
Original post by Mya_oty
Gravity + acceleration?


No. It's just the weight and the upwards force from the bucket.
Reply 9
Oh okay. Do I just use f=ma again then?
Original post by Mya_oty
Oh okay. Do I just use f=ma again then?


Yep.
Reply 11
Okay great so for a) f=ma for the bucket on the brick

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