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A cube of mass M is shown on an incline at times T
1
, T
2
, T
3
, and T
4
, with equal time intervals.
F
contact
is the force which the surface applies to the cube, and
F
total
the total force acting on the cube.
A coordinate system, with orthogonal coordinates Q and S, is also shown in the figure. Indicate the correct choice for each quantity below.
Example: For the S-component of the weight of the cube, the correct choice is "negative".
positive
negative
zero
The Q-component of the weight of the cube is ...
positive
negative
zero
The S-component of
F
total
is ...
positive
negative
zero
The Q-component of
F
contact
is ...
positive
negative
zero
The S-component of
F
contact
is ...
positive
negative
zero
The Q-component of
F
total
is ...
positive
negative
zero
The magnitude of
F
total
is ...
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