First, find the magnitude of v , that is, the speed v of the two-car unit after the collision.?
in this problem we will consider the collision of two cars initially moving at right angles. we assume that after the collision the cars stick together and travel off as a single unit. the collision is therefore completely inelastic.

two cars of masses m1 and m2 collide at an intersection. before the collision, car 1 was traveling eastward at a speed of v1, and car 2 was traveling northward at a speed of v2. (figure 1) after the collision, the two cars stick together and travel off in the direction shown.

first, find the magnitude of v , that is, the speed v of the two-car unit after the collision.

express v in terms of m1, m2, and the cars' initial speeds v1 and v2.
i got an answer to be v=sqrooot( (m1*v1)/(m1+m2))^2+((m2*v2)/(m1+m2) )^2
is this wrong ? ?

Automobile fuel efficiency is often measured in miles that the car can be driven per gallon of fuel (mpg). heavier cars tend to have lower fuel efficiencies (lower mpg ratings). which variable (weight or fuel efficiency) is most naturally considered the explanatory (predictor) variable in this context?

An isolated conducting spherical shell carries a positive charge. part a which statement (or statements) about the electric field and the electric potential inside and outside the spherical shell is correct? which statement (or statements) about the electric field and the electric potential inside and outside the spherical shell is correct? electric potential inside the shell is constant and outside the shell is changing as 1/r2 both the electric potential and the electric field does change with r inside and outside the spherical shell electric potential inside and outside the shell is constant, but not zero electric potential inside the shell is constant and outside the shell is equal to zero electric field inside and outside the shell is constant (does not change with the position r), but is not equal to zero electric field inside and outside the shell is changing as 1/r (where r is the distance from the center of the sphere) electric field inside is equal to zero and outside the shell is constant, but not zero electric potential inside the shell is constant and outside the shell is changing as 1/r electric field inside and outside the shell is changing as 1/r2 electric field inside is equal to zero and outside the shell is changing as 1/r2 electric field inside and outside the shell is zero electric field inside is constant and outside the shell is changing as 1/r

10 points! will mark brainiest! in a heat engine if 1,000 j of heat enters the system and the piston does 500 j of work, what is the final internal energy of the system if the initial energy was 2,000 j 1: write the equation2: list out your known variables 3: plug the numbers into the equations 4: solve 5: write your solution statement that includes initial energy and final energy added you so much!