(a) can a single object have kinetic energy but no momentum? (b) can a system of two or more objects have a total kinetic energy that is not zero but a total momentum that is zero? account for your answers.

(a) Can a single object have kinetic energy but no momentum? No, it can't

(b) Can a system of two or more objects have a total kinetic energy that is not zero but a total momentum that is zero? Yes, it can

Explanation:

(a) No,

as we know, the equation for the momentum (P) of single object is

P = mv

where

P = momentum (kgm/s)

m = Mass (kg)

v = speed (m/s)

and the kinetic energy (KE) of single object is

KE =

KE = kinetic energy

m = mass (kg)

v = speed (m/s)

thus, the momentum cannot be zero if it has kinetic energy since kinetic energy is proportional to the square of velocity and momentum is proportional to the velocity.

(b) yes

the two or more object is able to have kinetic energy but zero momentum. for example, two identical object move with the same velocity but different direction resulting in the total momentum to be zero.

P = mv + (-mv) -> opposite direction

but the total kinetic energy is not zero.

KE = +

     =

two charges are fixed in place on the x-axis as shown. the charge at x = 0 is negative and has magnitude q = 2 μcoulombs (1 μcoulomb = 10-6 coulombs). the charge at x = d, (d = +12 cm), is positive and has magnitude q = 4 μcoulombs. find a point x = xo along the x-axis at which the electric field is zero.

hello, i am papaguy.

i have found an answer to your question but use it as information.

information: because weak acids/bases have low concentration of hydrogen ions, the addition of water has a large impact on the ph. 2. a difference in 1 unit is a 10x difference in concentration for example; a liquid with ph of 3 is 10x more acidic than a liquid with a ph of 4. therefore, a liquid with a ph of 3 is stronger.

best of luck!