If you exert 250J of work onto a lever that is 5m long, what amount of force are you applying?
2 answers:
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Answer:
5
Explanation:
Volume of raft,
Density of raft,
Total weight= Buoyant force
Assuming n number of friends weighing 65 Kg then
(20+55+65n)g= Buoyant force
Buoyant force will be given by multiplying density of water by volume by acceleration due to gravity
g is on both sides so they cancel
75+65n=400
65n=400-75=325
Therefore, 5 friends each weighing maximum of 65 Kg can go with you on one trip
Answer: 5 units
Let's begin by stating clear that movement is the change of position of a body at a certain time. So, during this movement, the body will have a trajectory and a displacement, being both different:
The trajectory is the path followed by the body (is a scalar magnitude).
The <u>displacement</u> is the distance in a straight line between the initial and final position (is a vector magnitude).
According to this, in the description of the object (figure attached) placed at 0 on a number line and moving some units to the left and some oter units to the right, we are talking about the path followed by the object, hence its trajectory. So, 13 units is its trajectory.
But, if we talk about displacement, we have to draw a straight line between the initial position of the object (point 0) to its final position (point 5).
Now, being this an unidimensional problem, the displacement vector for this object is 5 units.
