Where is the cube I don't see any picture?
Weight increases but mass stays the same
False, as an object falls its potential energy turns into kinetic energy thus decreasing the potential energy.
The vertical force exerted on the lawn is 68.8 N downward
Explanation:
The vertical force exerted by the lawnmower on the lawn is equal to the vertical component of the force applied, therefore:

where
F is the magnitude of the force applied
is the angle between the direction of the force and the horizontal
In this problem:
F = 120 N
Substituting,

where the negative sign means the direction of the force is downward.
Learn more about vector components and forces here:
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<span>by vectors that are all the same length
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