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Alexandra [31]
3 years ago
10

2. In a race, if a runner starts and stops at the same position, what is their displacement? *

Physics
1 answer:
dedylja [7]3 years ago
6 0

Answer:

It is the same

Explanation:

I Jsut know

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Olivia wants to find out whether a substance will fluoresce. She says she should put it in a microwave oven. Do you agree with h
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Fluoresce objects will only glow when put under actual Ultraviolet light. This is due to the molecules becoming excited by the ultraviolet radiation.


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Which law states that energy is neither created nor destroyed? a. Law of Conservation of Mass
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C. Law of Conservation

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Match the major muscle group with its functional role.
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Answer:

Abdominal

Sitting up, postural alignment

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Lifting, pulling

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Overhead lifting

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Obliques

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Quadriceps

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Trapezius

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Triceps

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God bless you. Because my soul almost left my body when i had to do this.

7 0
3 years ago
Aparticlewhosemassis2.0kgmovesinthexyplanewithaconstantspeedof3.0m/s along the direction r = i + j . What is its angular momentu
svetoff [14.1K]

Answer:

\vec{L}=-30\frac{kgm^2}{s}\hat{k}

Explanation:

In order to calculate the angular momentum of the particle you use the following formula:

\vec{L}=\vec{r}\ X\ \vec{p}       (1)

r is the position vector respect to the point (0 , 5.0), that is:

r = 0m i + 5.0m j    (2)

p is the linear momentum vector and it is given by:

\vec{p}=m\vec{v}=(2.0kg)(3.0m/s)(\hat{i+\hat{j}})=6\frac{kgm}{s}(\hat{i}+\hat{j})   (3)

the direction of p comes from the fat that the particle is moving along the i + j direction.

Then, you use the results of (2) and (3) in the equation (1) and solve for L:

\vec{L}=-30\frac{kgm^2}{s}\hat{k}

The angular momentum is -30 kgm^2/s ^k

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