rear impact(Motor V.) forces

Not sure what you are asking...

Are you asking if the Honda would bounce, yes

Are you asking if there would be a forward pushing force on the Ford, yes

But I am not sure what you mean by additional forward thrust, do you mean in addition to the forward motive force the Ford had already? Then yes.

Please clarify your question. Thanks

I meant to ask if the honda hits the tire(large tire)and the tire retains its air pressure,then it would seem to me that there would be additional forward thrust kind of like a recoil effect-Could this be a factor? example; if a tire is dropped off a two story structure on to concrete,there would be quite a bounce. Rolf Herstad

If the honda struck the rear tire of the pickup, there is the possibilty that the rear suspension is bent. Take it to an alignment shop to check it out.

I believe the answer is no. The Honda has certain amount of energy due to its velocity. It has this energy no matter where on the Ford it strikes. If the Honda slips under the bumper of the Ford then instead of all the energy being applied to or absorbed by the bumper only part of the energy is applied to or absorbed by the Ford bumper and the rest of the energy would be applied to whatever other structual elements the Honda encountered in its collision be it framing or the tire.

Yes, the Honda would impart a forward thrust to the Ford. Calculating the amount of forward thrust, and its timing, millisecond by millisecond, would require quite extensive computer modeling, with details of all of the structures involved. Even when the situation is much simpler, (e.g., where the manufacturer of a vehicle has full access to all the drawings of all the pieces involved, and where the impact is with a standardized barrier) running the simulations can cost hundreds of thousands of dollars.

I suppose the best you could do, after an accident has happened, might be to take the kinetic energy of the Honda at a 20 mph closing speed, and guesstimate the deceleration at 5 - 10 points during the collision as parts of the Honda, (and Ford to lesser extent) deform. You'd expect a peak, for example, when the engine of the Honda contacts the frame rails of the Ford, assuming the Ford was not "jacked up" so high that the Honda engine went right under the frame rail.

I'd guess that much of the energy would have been dissipated by the time the forwardmost part of the Honda hits the Ford tire (again, depending upon the height of the Ford.) Whether or not (and the extent to which) the Honda would bounce back somewhat would depend upon many factors, such as the height of the tire-Honda impact point, the energy at that instant, the degree to which the Ford's brakes are applied, the extent to which the two vehicles have been locked together by friction and "keying" of parts, whether the speeds at contact were 0-and-20 or 30-and-50, etc.

Volvo sends out a team to many (most?) accidents in Sweden in which a Volvo is involved. They could give you some insights. I am unaware of any other manufacturer which routinely does this to find out how their designs work in real world conditions.

Ken - "Yes, the Honda would impart a forward thrust to the Ford" is true but the question was would there be "additional" forward thrust. The Honda has x amount of potential energy, some of which would be converted to kinetic energy when it hits the bumper and the rest when it hits whatever else might be in the way whether it is tire or other vehicle structuire. There is no "additonal energy" to impact the tire. Only the original energy minus losses of striking the bumper.

Perhaps it is a poorly worded question open to misinterpretation, but coonservation of energy says there can be no additional energy beyond the original impact energy which is divided between the bumper and tire.

I agree, in essence, although your terminology is a little unusual. Ordinarily, we'd say that the Honda has some amount of kinetic energy (energy of motion), rather than potential energy (energy of position). In the collision, some of that that kinetic energy is transferred to the Ford, and some goes off as heat in bent sheet metal and sound.

I really don't know exactly what the original poster was asking. I took the "additional thrust" to mean momentum transfer beyond that already transferred in the collision prior to tire contact. So perhaps 60% of the Honda's energy is transferred to the Ford before tire contact, and an "additional" 30% is transferred through the tire.

Is the Ford using the Honda for traction maybe

I drive a Ford PU. I was rear ended by a woman in a Lexus. Close enough? Yes, there was a definate forward thrust. Final result was that the Ford PU won. I did not even have a decent scratch to show off while the front end of her Lexus was destroyed. Turned out all right though, she was the State Farm Insurance Agent for this area so they replaced her car. (She was on her cell phone when she hit me...) Oh yeah, it happened right in front of a State Trooper so she and State Farm were out of luck in the "Lets blame the other driver game.

I have seen this happened between a medium size car (not a Honda) and a construction truck with exposed back wheels.

The result the small car were lifted at about 100 km/h on the side of the contact and just flipped over.

I did not had time to inspect the velocity change of the truck because I had to change velocity in a hurry myself.