After measuring a sample of individuals, a researcher finds that one participant's score is three times bigger than another part
1 answer:
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Answer:
a) perfectly inelastic, b) collision is inelastic, c) elastic
Explanation:
In this exercise, it is asked to identify what type of shock occurs between the skater and the frisbee, for this we must define a system formed by the skater and the fribee, so that the forces during the crash have been internal and the amount of movement is preserved
Initial instant. Before the skater touches the frisbee
p₀ = M v₁ + m v₂
where M and m are the masses of the skater and frisbee, respectively
for the final moment they give us several possibilities, in all case the moment is conserved
p₀ =
case a)
Final instant. grabs the frisbee and holds it
p_{f} = (M + m) v '
p₀ = p_{f}
We can see that this shock is perfectly inelastic, it holds the fressbee
case b)
final instant.
This case is similar to the previous one, but the final speed of fresbee is zero, therefore this collision is inelastic and the kinetic energy is not conserved.
case c)
final instant. Grab the fressbee and resend it
this is an elastic Shock since the equivalent of a rebound of the fressbee, the kinetic energy is conserved.
1) Distance: 44 blocks
2) Displacement: 10.2 blocks at north of east
Explanation:
1)
- Distance is a scalar quantity that gives a measure of the total length of the path travelled by an object, regardless of its direction
- Displacement is a vector quantity which connects the initial position to the final position of motion of the object. Being a vector, it has both magnitude and direction: the magnitude is the shortest distance between initial and final position, while the direction goes from the initial to the final position.
In this problem, the motion is:
18 blocks north
10 blocks east
16 blocks south
So, the distance is the sum of the distances covered in each part:
distance = 18 + 10 + 16 = 44 blocks
2)
The displacement can be calculated by evaluating the initial and the final position. Along the north-south direction, the displacement is
blocks north
Along the east-west direction,
blocks east)
So, the magnitude of the displacement is given by Pythagorean's theorem
blocks
And the direction is given by
measured as north of east.
Learn more about distance and displacement:
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