PH-157
Resultant force and F = ma
Physics · Secondary 3 · Hard · Resultant force and F = ma
A 0.8 N helium balloon is held at rest by a vertical string. The upward lift force on the balloon is 3.0 N. Assuming the balloon is in equilibrium, what is the tension in the string?
- 2.2 N
- 3.8 N
- 1.4 N
- 0.8 N
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