# maths/physics

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A rubber ball weighs 49 N. What is the acceleration of the ball if an upward force of 69 N is
applied?

• maths/physics -

Hint: The net force on the ball is
F = 69 - 49 = 20 N

The mass of the ball is
M = 49/g = 5.0 kg

The acceleration is a = F/M

• maths/physics -

4 meters / (seconds squared)

• maths/physics -

13.8

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