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123tricks
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Homework Statement
Calculate the force needed to accelerate a 2.0kg ball at 3.0ms^2
(A) In space, a long way from Earth.
(B) On a frictionless horizontal surface, near the surface of the earth.
(C) vertically upward, near the surface of the earth.
Homework Equations
F = m*a
The Attempt at a Solution
(A) F = 2.0 * 3.0
F= 6N?
(B) Same as above?
(C) I am confused on this one.
Would it be F = m*a
F = 2.0 *(9.8 - 3.0)
F= 2.0 * 6.8
F= 13.6N?
or
F = 2.0 * 12.8 (To get from -9.8 to 3 = 12.8)
F= 24.8N
If those answers are wrong could anyone point me in the right direction as to what I am doing wrong?
Thanks.
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