Can an object’s velocity change direction when its acceleration is constant?
1 answer:
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Answer:
2324 J
Explanation:
The formula for work is:
where is the force applied, and
is the distance moved, in this case
and we need to find
Since the crate is not moving up or down, we conclude that the <u>normal force must be equal to the weight </u>of the object:
where is the normal force and
is the weight, which is:
, where g is the gravitational acceleration
and
is the mass
.
---------
Thus the normal force is:
Now, the force due to the friction is defined as:
where is the coefficient of friction,
So, for the crate to move, the force applied must be equal to the frictional force:
And now that we know the force we can calculate the work:
substituting known values:
Answer:
Yes
Explanation:
A position describes the position of an object relative to the x/y-axis (or the four cardinal directions). A velocity is a vector quantity, defining speed with direction.
So if an object is in a positive position, it means they are in the positive x-axis direction (or wherever on the scale the positive values are stated to be) and if it has a negative velocity, it means said object is moving in the opposite direction of the positive x-axis. It is possible for the object to still be in the positive position as it's moving with a negative velocity
