HomeworkLib
Question

During a rain storm, rain comes straight down with a velocity Vi = -15 m/s and...

During a rain storm, rain comes straight down with a velocity Vi = -15 m/s and hits the roof of a car perpendicularly. The mass of the rain per second that strikes the roof is 0.060 kg every second. Assuming that the rain comes to rest upon striking the car (Vf = 0 m/s), find the average force exerted by the rain on the roof during a 3 second time interval.

science   physics   
0 0
Add a comment Improve this question Transcribed image text
Next > < Previous
Sort answers by oldest

Homework Answers

Answer #1

The average force is continuous, so the 3 second time interval is IRRELEVANT. Please explain this to your instructor if necessary!

Average Force = Averate rate of change of momentum = (0.06kg*15m/s)/s = 0.9 N.s/s

Average Force = 0.9 N.s/s = 0.9 N <= ANS

It is WRONG to multiply (or divide!) this result by 3!

0 1
Add a comment
Answer #2

F = v*dm/dt

= 15 * 0.06

= 0.9 N

The average force i independen of the time mentioned = 3s

0 0
Add a comment
Know the answer?
Add Answer to:
During a rain storm, rain comes straight down with a velocity Vi = -15 m/s and...
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for? Ask your own homework help question. Our experts will answer your question WITHIN MINUTES for Free.
Similar Homework Help Questions

  • During a rain storm, rain comes vertically down with a aped of -30.0 m/s and hits...

    During a rain storm, rain comes vertically down with a aped of -30.0 m/s and hits the roof of a Ford Fusion perpendicularly. The mass of raindrops per second which strikes the car roof is 0.0758 kg/s. Assuming that the raindrops come to a complete stop upon hitting the car, what is the average force exerted on the roof of the car by the rain?

  • During a storm, the rain falls directly with a speed V0 = -15m / s hits...

    During a storm, the rain falls directly with a speed V0 = -15m / s hits the roof of a car perpendicularly. The mass of rain per second that hits the car Vf = 0 m / s, find the force the average force exerted by the rain on the roof

  • Andone is a 88-kg man.The woman movés away wih spel0l D) 4.07 m/s C) 0.75 m/s A) -15 m/s B) 5.0 m...

    please show work for 4 and 6 andone is a 88-kg man.The woman movés away wih spel0l D) 4.07 m/s C) 0.75 m/s A) -15 m/s B) 5.0 m/s 4Rain comes down with a velocity of -15 m/s and hits the roof of a car. The mass of rain per second that strikesthe roof of the car is 0.060 kg/s. Assuming that rain comes to rest upon striking the car, find the average force exerted by the rain on the...

  • The hail comes straight down at a mass rate of m/Δt=0.0690 kg/s and an initial velocity...

    The hail comes straight down at a mass rate of m/Δt=0.0690 kg/s and an initial velocity of v0= -15.0 m/s. Suppose that the hail described there bounces off the roof of the car with a velocity of +12.6 m/s. Ignoring the weight of the hailstones, calculate the magnitude of the force exerted by the hail on the roof.

  • drops of rai fall perpendicular to te roof of a parked car during rainstorm. The drops...

    drops of rai fall perpendicular to te roof of a parked car during rainstorm. The drops strike the rook with a speed of 15 m/s and the mass of rain per second striking the roof is 0.071 kg/s a. Assuming the drops come to rest after striking the roof, find the average force exerted by the rain on the roof. b. If hailstones having the same ass as the rian drops fall on the roof at the same rate with...

  • A car is traveling along a straight road at a velocity of +28.1 m/s when its...

    A car is traveling along a straight road at a velocity of +28.1 m/s when its engine cuts out. For the next 2.97 seconds, the car slows down, and its average acceleration is . For the next 4.30 seconds, the car slows down further, and its average acceleration is . The velocity of the car at the end of the 7.27-second period is +21.3 m/s. The ratio of the average acceleration values is = 1.37. Find the velocity of the...

  • A 61.0 kg diver steps off a 14.0 m tower and drops straight down into the water. If he comes...

    A 61.0 kg diver steps off a 14.0 m tower and drops straight down into the water. If he comes to rest 7.00 m beneath the surface of the water, determine the average resistance force exerted by the water on the diver.

  • A car is traveling along a straight road at a velocity of +36.0 m/s when its...

    A car is traveling along a straight road at a velocity of +36.0 m/s when its engine cuts out. For the next ten seconds the car slows down, and its average acceleration is a1. For the next five seconds the car slows down further, and its average acceleration is a2. The velocity of the car at the end of the fifteen-second period is +22.4 m/s. The ratio of the average acceleration values is a1/a2 = 1.66. Find the velocity of...

  • A car is traveling along a straight road at a velocity of +46.9 m/s when its...

    A car is traveling along a straight road at a velocity of +46.9 m/s when its engine cuts out. For the next twelve seconds the car slows down, and its average acceleration is a1 . For the next six seconds the car slows down further, and its average acceleration is a2. The velocity of the car at the end of the eighteen-second period is +31.2 m/s. The ratio of the average acceleration values is  . Find the velocity of the car...

  • A car with an initial velocity of 11 m/s comes to rest in 3.2 s ....

    A car with an initial velocity of 11 m/s comes to rest in 3.2 s . What is the car's average acceleration during braking? Give both magnitude and sign.

ADVERTISEMENT
Free Homework Help App
Download From Google Play
Scan Your Homework
to Get Instant Free Answers
Need Online Homework Help?
Ask a Question
Get Answers For Free
Most questions answered within 3 hours.
ADVERTISEMENT
ADVERTISEMENT