Find the velocity of the rain drops with respect to the man?

In summary: Let me try again.In summary, the question is asking for the velocity of raindrops with respect to a man walking on a level road. The explanation includes a diagram where the horizontal component of rain relative to the man is in the opposite direction and denoted as '-v man.street'. The minus sign in this context represents the opposite direction of +velocity, which is to the right (the direction of the man's walk). This explanation follows the Socratic Method, encouraging critical thinking and understanding rather than just providing the answer.
  • #1
177
11
[Mentors' note: No template, as this post was moved from the technical forums]
Q. A man is walking on a level road at a speed of 3.0 km/h. Raindrops fall vertically at a speed of 4.0 km/h. Find the velocity of the raindrops with respect to the man,
A. The explanation is below:
Here I don't understand the diagram. Why the resultant vector left downward is between -v man.street and v rain.street? what does '-v man.street' denote on the diagram?
 

Attachments

  • VOLUME-CONCEPTSOFPHYSICS(PDF)-1.jpg
    VOLUME-CONCEPTSOFPHYSICS(PDF)-1.jpg
    41.7 KB · Views: 430
Last edited by a moderator:
Physics news on Phys.org
  • #2
Indranil said:
Q. A man is walking on a level road at a speed of 3.0 km/h. Raindrops fall vertically at a speed of 4.0 km/h. Find the velocity of the raindrops with respect to the man,
A. The explanation is below:
Here I don't understand the diagram. Why the resultant vector left downward is between -v man.street and v rain.street?
what do you think?
what does '-v man.street' denote on the diagram?
What does a minus sign mean on ANY vector diagram that is oriented with the +x direction as the positive vector direction?
 
  • #3
Indranil said:
what does '-v man.street' denote on the diagram?

The horizontal component of the rain relative to the man.

If +velocity is to the right (the direction of the man's walk), then the horizontal component of rain relative to the man is in the opposite direction; minus.
 
  • #4
Whatever happened to the Socratic Method, as opposed to just spoon-feeding the answer?
 
  • #5
phinds said:
Whatever happened to the Socratic Method, as opposed to just spoon-feeding the answer?
Whoops. You're right.
 
  • Like
Likes phinds

1. How do you determine the velocity of rain drops with respect to a man?

To determine the velocity of rain drops with respect to a man, you would need to measure the speed and direction of the rain drops and the speed and direction of the man's movement. These values can then be used to calculate the relative velocity of the rain drops with respect to the man.

2. What factors affect the velocity of rain drops with respect to a man?

The velocity of rain drops with respect to a man can be affected by several factors, such as the speed of the wind, the size and shape of the rain drops, and the angle at which the rain is falling. The man's own movement and the surrounding environment can also have an impact on the velocity of the rain drops.

3. Can the velocity of rain drops with respect to a man be negative?

Yes, the velocity of rain drops with respect to a man can be negative if the man is moving in the opposite direction of the rain drops. This would indicate that the rain drops are moving away from the man rather than towards him.

4. How is the velocity of rain drops with respect to a man different from the velocity of rain drops in general?

The velocity of rain drops with respect to a man takes into account the movement of the man, while the velocity of rain drops in general only considers their speed and direction in relation to the ground. The velocity with respect to a man is a relative velocity, while the velocity in general is an absolute velocity.

5. What is the unit of measurement for the velocity of rain drops with respect to a man?

The unit of measurement for the velocity of rain drops with respect to a man is typically meters per second (m/s). This unit indicates the distance the rain drops travel in one second with respect to the man's movement.

Suggested for: Find the velocity of the rain drops with respect to the man?

Back
Top