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Two masses are joined together by a massless, inextensible string. A vertical force of 30N applied to the upper mass gives the system a constant upwards accelration of 3.2 `m//s^(2)`. If the tension in the connecting string is 18N, what is the lower mass?

A

1.38kg

B

2.24kg

C

3.35kg

D

5.8kg

Text Solution

Verified by Experts

`18-m_(2)g=m_(2)xx3.2`
`18=m_(2)(3.2+9.8)`
`18=m_(2)(13)`
`m_(3)=(18)/(13)kg`
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