Your groceries are in a bag with paper handles. The handles willtear off if a fo

Question

Your groceries are in a bag with paper handles. The handles willtear off if a force greater than 55 Nis applied to them.

(a) What is the greatest mass of groceries thatcan be lifted safely with this bag, given that the bag is raisedwith constant speed?
1 kg

(b) What if it is raised with an acceleration of 1.39 m/s2?
2 kg (a) What is the greatest mass of groceries thatcan be lifted safely with this bag, given that the bag is raisedwith constant speed?
1 kg

(b) What if it is raised with an acceleration of 1.39 m/s2?
2 kg

Explanation / Answer

   Force   F   =   m* ( a + g)    m   =   mass,   a   =   upwardsacceleration of the bag.    a.   For constantvelocity   a   =   0    55   =   m *9.8        maximummass   m   =   55 /9.8   =   5.61   kg    b.   a   =   1.39   m/s2    55   =   m * (1.39 + 9.8)    m   =   55 /11.19   =   4.91   kg    55   =   m * (1.39 + 9.8)    m   =   55 /11.19   =   4.91   kg

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