Raindrops striking car - find impulse

  • Thread starter Thread starter nemesis08
  • Start date Start date
  • Tags Tags
    Car Impulse
AI Thread Summary
To find the impulse of raindrops striking a car, calculate the total momentum change for the drops hitting the roof. Each raindrop has a mass of 3.7 x 10^-4 kg and strikes at a speed of 2.5 m/s, coming to rest upon impact. With 150 raindrops per square meter and a roof area of 5.0 m^2, the total number of raindrops is 750. The impulse can be determined by multiplying the total mass of the raindrops by their velocity. Understanding that impulse equals the change in momentum is crucial for solving this problem.
nemesis08
Messages
3
Reaction score
0
I have this exercise of many i have to do but this is the hardest of them and i don't get it much.


While a car is stopped at a traffic light in a storm, raindrops strike the roof of the car. The area of the roof is 5.0 m^2. Each raindrop has a mass of 3.7 x 10^-4 Kg and speed of 2.5 m/s before impac6 and is at rest after impact. If, on average at given time, 150 raindrops strike each square meter, what is the impulse of the rain striking the car?


is there a formula for this or something? This physics class is driving me crazy, i understand the lab but the class professor (is different than the lab one) is old doesn't explain too well and I am just lost.
 
Physics news on Phys.org
Impulse is just change in momentum and momentum is just mass*velocity.
So work out mass*speed of each drop, and total number of drops in that area.
 

Thread 'Rolling without slipping on a curved surface'

Kindly see the attached pdf. My attempt to solve it, is in it. I'm wondering if my solution is right. My idea is this: At any point of time, the ball may be assumed to be at an incline which is at an angle of θ(kindly see both the pics in the pdf file). The value of θ will continuously change and so will the value of friction. I'm not able to figure out, why my solution is wrong, if it is wrong .
View full post »
Thread 'Trying to understand the logic behind adding vectors with an angle between them'

Thread 'Trying to understand the logic behind adding vectors with an angle between them'

My initial calculation was to subtract V1 from V2 to show that from the perspective of the second aircraft the first one is -300km/h. So i checked with ChatGPT and it said I cant just subtract them because I have an angle between them. So I dont understand the reasoning of it. Like why should a velocity be dependent on an angle? I was thinking about how it would look like if the planes where parallel to each other, and then how it look like if one is turning away and I dont see it. Since...
View full post »
Thread 'Correct statement about a reservoir with an outlet pipe'

Thread 'Correct statement about a reservoir with an outlet pipe'

The answer to this question is statements (ii) and (iv) are correct. (i) This is FALSE because the speed of water in the tap is greater than speed at the water surface (ii) I don't even understand this statement. What does the "seal" part have to do with water flowing out? Won't the water still flow out through the tap until the tank is empty whether the reservoir is sealed or not? (iii) In my opinion, this statement would be correct. Increasing the gravitational potential energy of the...
View full post »

Similar threads

Find Pressure Exerted on Roof by Raindrops in Tropical Storm
Replies
1
Views
6K
Pressure problem - Impulse of object striking a head
Replies
6
Views
3K
Calculating Impulse for Hailstones Striking Car Roof
Replies
2
Views
3K
Help with Impulse, Free-Fall, and Momentum?
Replies
8
Views
8K
Question relates to Degree and some other simple question.
Replies
2
Views
2K
Velocity needed to launch a car
Replies
2
Views
2K
Car collision with constant deceleration
Replies
4
Views
4K
Find the velocity of the stock car
Replies
24
Views
3K
Car Suspension Homework: Find Speed to Avoid Wild Bouncing
Replies
1
Views
3K
Physics Test Prep: Calculating Velocities, Impulses & Frictional Forces
Replies
22
Views
4K

Hot Threads

Recent Insights

Back
Top