i have done some work on this question and was wondering if i have done it right. i would appreciae corrections if im wrong or atleast mistakes being pointed out. thanks.(adsbygoogle = window.adsbygoogle || []).push({});

two small blocks each of mass 4.0kg are connected by a string of constant length 120cm and negligible mass. Block A is placed on a frictionless tabletop, and block B hangs over the edge of the table. the tabletop is 60cm above the floor. Block B is then released from rest at a height of 30cm above the floor at t=0.

a) find acceleration

b) determine distance between landing points of two blocks

a) Fnet=ma

Fnet=T

T=4a

4g-T=4a

4g-(4a)=4a

4g=8a

a=4(9.8)/8

a=4.9m/s2

b) vf2= vi2+2ad

vf2=0+ 2(4.9)(0.6)

vf=2.4m/s

vfy=3.43m/s

vf=vi+ at

3.43=9.8t

t= 0.35s

dx=vixt+0.5gt2

dx=vixt+0.5gt2

dx=2.4(0.35)+0.5(9.8) (0.35)2

dx= 1.44m

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# Homework Help: I need help on this question

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