Physics people help me please hw?

Question

How does the resultant displacement change as the angle between two vectors increases from 0 to 180??? huh?????????????

i keep getting confused between displacement and vector and scalar? any way you can help me distinguish?

Answer 1

Displacement is a vector, a scalar is a number. A vector is a type of line segment with a defined beginning and a defined end.
To answer the first part, the resultant displacement decreases ad the angle increases from 0 to 180.

Answer 2

Displacement is one of many things that is a vector. Let's say you're walking across a desert needing to get to the oasis north of you. You start from a place that has a sign and an arrow saying what direction the oasis is. You walk a day and keep looking at your footprints behind you to see that you're going straight. But while you stop for the night a windstorm comes up and blows all your footprints away so you have to guess which way to head when you start again. If you get lucky and head in the same direction as the day before, great - you have doubled your progress toward the oasis. The resultant of the 2 sections of your walk is double the individual sections.

But if you head off course by 45 degrees for the 2nd day the resultant will be ... Draw the 2 walks, one north and from the end of that section, draw a section with equal length but heading north-east. The resultant will be from the sign to the end of the 2nd section of the walk. You could just as well have walked in the direction of the resultant. It would have been a bit shorter.

Experiment with other 2nd section directions, the resultant is a vector that describes the total displacement accomplished by the 2 day walk. If after that windstorm you choose a path 180 from the day before you should end up back at the sign and your resultant will be zilch.

An example of a scalar is mass. Scalars have no direction attached to their definition. Time is a scalar. If you multiply a vector by a scalar, the result is a vector. Velocity is a vector. Multiply it by time and you get another vector: displacement.

Answer 3

Acceleration = stress / mass. velocity = acceleration * time. potential = stress * velocity #a million assume uniform stress at each and each section. interior the blocks, the acceleration = 5/0.2 = 20m/s² stress = 20*70 = a million,400N Out of the blocks, acceleration = (12-5)/5 = 7/5m/s² stress = 7/5*70 = 98N everyday potential = ninety 8*(12+5)/2 = 833W #2 Conservation of potential. assume gravity = 10 m/s² (you should use 9.80 one in case you like and you have a calculator) potential potential at 100m relative to the floor = 10 * one hundred * 3 = 3,000J potential potential at 50m = a million,500J Kinetic potential at 50m = a million,500J you could calculate its velocity from this: 31.6 m/s