What is Impulse: Definition and 929 Discussions

In the field of consumer behavior, an impulse purchase or impulse buying is an unplanned decision by a consumer to buy a product or service, made just before a purchase. One who tends to make such purchases is referred to as an impulse purchaser, impulse buyer, or compulsive buyer. Research findings suggest that emotions, feelings, and attitudes play a decisive role in purchasing, triggered by seeing the product or upon exposure to a well crafted promotional message.

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  1. P

    How Do You Calculate Final Velocity and Change in Momentum for a Moving Body?

    hi guys I am a college junior...taking physics for the first time in my life...its fun...but still tuff...just can i get help with these couple questions..i mean it would be very gracious of any of u to help me out...i know I am new and all, but this place...i was just browsing around and it...
  2. B

    Impulse and Momentum of a falling student

    Can anyone assist, I have tried various formulas on both problems with no luck. Thanks for any assistance or feedback. 1) A student (m = 59 kg) falls freely from rest and strikes the ground. During the collision with the ground, he comes to rest in a time of 0.020 s. The average force...
  3. N

    Calculating Velocity and Impulse of Broken Plate

    Q. While thinking about your physics homework, you drop one of your mom's dinner plates on the floor breaking it into three pieces. The second piece has a mass of 2 times the first piece and flys off perpendicular to it. These first two pieces both have a speed of 2.6 m/sec. The third piece...
  4. K

    How Do You Calculate Impulse for a Bungee Jumper?

    Hey I've been having trouble with this impulse problem, in fact I don't even seem to know where to start. My prof didn't even cover any impulse problems in class and then expects us to do one for homework. :rolleyes: But anyways, any help would be appreciated, I'm sure there's someone who can...
  5. D

    Find the direction and magnitude of the impulse

    A .14 kg baseball moves toward home plate with a velocity vi=-36 m/s x. After striking the bat moves vertically upward with a velocity vf= 18 m/s y. (a) Find the direction and magnitude of the impulse delivered to the ball by the bat. Assume that the ball and bat are in contact for 1.5ms. (b)...
  6. A

    Proof of the scaling property of an impulse function

    I am presently taking my first course in signals and systems and I have been charged with proving the scaling property of the impulse function; that: delta(a(t-to)) = 1/abs(a)*delta(t-to) I am seriously miffed and need some help.
  7. S

    Mathematica Understanding Impulse, Intensity & Inertia

    Could someone explain to me the mathematical differences between impulse, intensity, and inertia? I mean, they all start with I's, but I still cannot determine any mathematical precision instead variation among these three.
  8. P

    Final Momentum & Velocity of 3kg Object after 24N Impulse

    ok, i get this question that says: "An object of mass 3.0 kg is moving in the neg. x direction with a speed of 2 m/s. it is acted upon by a force with an impulse of 24 N s. What is the final momentum and the final velocity after that impulse has acted on the object? so i did P(initial) = mv...
  9. P

    Calculate Momentum & Impulse for Mass 0.25kg, Speed 15m/s

    This question kinda stumped me :frown: ... Suppose that a ball of mass 0.25 Kg is moving downward at a speed of 15 m/s when it lands in your hand. (a) If it takes .15 s to bring it to rest in your hand, what is the net impulse your hand exerts on the ball to bring it to rest? Give both size...
  10. S

    Calculate missing mass from given impulse

    hey all... really struggling with how to attack this question: On September 12, 1966, a Gemini spacecraft piloted by astronauts Conrad and Gordon met and docked with an orbiting Agena launch vehicle. With plenty of fuel left in the spacecraft , NASA decided to determine the mass of the...
  11. C

    Impulse and Forces: Understand Why Changing Collision Time Affects Force

    According to what I've read, the reason we has safetly belts in cars is because "the collision is made longer, therefore force is decreased according to the impulse equation" and hammers are made of metal because "this is hard and makes collisions short, therefore force is large". Is it really...
  12. R

    What is the Impulse of a Baseball Bat on a 0.15 kg Ball Traveling at 6.0 m/s?

    A 0.15 kg ball traveling horizontally at 6.0 m/s is hit by a bat, after which it is traveling at 8.0 m/s perpendicular to the original direction. I'm supposed to determine the impulse that the ball receives from the bat. Since cos90 is zero, would this just be the mass multiplied by the...
  13. T

    How Do Momentum, Impulse, and Impact Relate to Newton's Second Law?

    Hi- I have a quiz tomorrow on Newton's 1st and 2nd Laws. I'm kind of iffy with the second law, especially when it comes to impulse and impact. What is impact, and how can you measure impulse? For example, what if an object is dropped onto a soft couch, etc, etc.. basic theories... i haven't yet...
  14. S

    How Can Impulse Be Converted to Energy in Rocket Flight Calculations?

    I am trying to calculate the height that a rocket engine will fly, by deriving the equation Gravitational potential energy(gPe)=FXH, where F is the weight of the engine and h is the vertical distance. The gPe at the rockets highest point must equal the chemical potential energy that the engine...
  15. L

    Impulse response and convolution? any help from anyone?

    hey, i did my undergrad in music and english and now am lost beyond reckoning with the impulse response stuff in my postgrad. Could anyone help with these exercises? They're examples from my lecture notes and have no idea how my lecturer got the answers. Please help? Ex.1) Show that x(t)*h(t)...
  16. L

    Impulse response? I need a bit of help with this if anyone can?

    hey, i did my undergrad in music and english and now am lost beyond reckoning with the impulse response stuff in my postgrad. Could anyone help with these exercises? They're examples from my lecture notes and have no idea how my lecturer got the answers. Please help? Ex.1) Show that x(t)*h(t)...
  17. L

    Help with impulse response and convolution?

    hey, i did my undergrad in music and english and now am lost beyond reckoning with the impulse response stuff in my postgrad. Could anyone help with these exercises? They're examples from my lecture notes and have no idea how my lecturer got the answers. Please help? Ex.1) Show that...
  18. B

    More impulse and restitution >.<

    God i hate this damned topic >.< Q. Two particles P and Q have speeds of 6m/s and 0m/s respectively. P directly collides with Q, the colision is perfectly elastic. a) find the speed of Q directly after impact b) find the impulse on Q a) so far i have worked out that using the law of...
  19. Clausius2

    Specific Impulse: Physical Meaning and Rocket Implications

    What is the physical meaning of the specific impulse?. All i know is what I've read in rocket informations. Its dimensions are s^(-1), and appear as one of the principal variables in rocket engines. Thanks.
  20. D

    Understanding Impulse and Momentum: Explained for High School Physics Students

    Hi! I'm a sixteen year old grade eleven physics student,and I'm having trouble understanding impulse and momentum.I would like you to clear up a few things for me. "suppose two identical cars traveling at the same speed are brought to a stop: one by its braks, the other by a concrete...
  21. J

    How Do Forces F1 and F2 Affect the Speed of a Slider Block?

    Question: The 40 kg slider block is moving to the right with a speed of 1.5 m/s when it is acted upon by the forces F1 and F2. If these loadings vary as shown (in the attachment called graph), determine the speed of the block at t =6s. Neglect friction and the mass of the pulleys and cords...
  22. J

    Impulse and Momentum of a crate

    Question (I added a picture): The free-rolling ramp has a mass of 40 kg. A 10 kg crate is released from rest at A and slides down 3.5 m to point B. If the surface of the ramp is smooth, determine the ramp's speed when the crate reaches B. Also, what is the velocity of the crate? This is...
  23. holly

    Impulse of bungee jumper slowing down

    Physics class is starting to sound like advertisements for toiletries: Men, try "Momentum!" Ladies, wear "Impulse" or "Joules," enriched with pheremones! Ha ha Having trouble with this problem, about a bungee jumper jumping off a cliff for 5 seconds total, in free fall for 3 seconds, then...
  24. K

    Calculating Impulse and Force: Can I Determine Collision Forces?

    Is it enough to know the momentums of the balls (and the angle) to determine what force they exert on each other when they collide? I know F delta t = m delta v but how can I know the time? Please help.
  25. T

    Could Nerve Impulse Amplifiers Make Someone Superhuman?

    Can any biology-savvy people comment on the viability of implants which boost the nervous signals to muscles, effectively making someone superhuman in strength and endurance? I can see how someone with these implants may end up killing themselves from over-exertion, but would something like this...
  26. D

    What impulse is needed to change the speed of a 16 kg object

    This question is infuriating me. It says the answer is 32, but I can't get that. -------------------------------------------------------------------- What impulse is needed to change the speed of a 16 kg object from 14 m/s to 26 m/s in a time of 5s? How much force is needed? mVf - mVi...
  27. benzun_1999

    How does impulse travel in our nerves

    hi all, I dontn know much in biology. The way messages are transmitted in our nerves has always amazed me. Can anyone explain how does impulse travel in our nerves. -benzun All For God
  28. Ivan Seeking

    Impulse Gravity Generator Based on Charged YBa_2Cu_3O_{7-y} Superconductor

    Assuming that this must be controversial at best, I am posting FYI. Impulse Gravity Generator Based on Charged YBa_2Cu_3O_{7-y} Superconductor with Composite Crystal Structure http://xxx.lanl.gov/abs/physics/0108005
  29. A

    Ok, I got an impulse problem here

    Ok, here the problem my teacher gave: The goal is to close an open door in the best possible manner. You have two objects, a bouncy ball and a big chunk of sticky mud. You decide to throw one of these objects at the door to close it. The bouncy ball will bounce off the door with the same...
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