After applying force P, block B accelerates to the right at 3m/s^2(adsbygoogle = window.adsbygoogle || []).push({});

When B has velocity of 2m/s determine:

1.The velocity of B relative to A

2.The acceleration of B relative to A

3.The absolute velocity of point C

The image attached show how this works.

I worked out the total length,L to get

L = 3(Sb - Sa) + (Sd - Sa)

so if you differentiate with respect to t you get

0 = 3 d(Sb - Sa)/dt + d(Sd - Sa)/dt

then im stuck.

or is the differential equation supposed to be

L = 3(Sb - Sd) + 4(Sd - Sa)

so differentiating would get

0 = 3 d(Sb - Sd)/dt + 4 d(Sd - Sa)/dt

because somehow Va=3/4Vb

if its the second differential equation could someone explain how to get from there to get Va and Vb?

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# Homework Help: Solving problem using DE

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