Two carts mounted on an air track are moving toward one another. cart 1 has a speed of 2.20 m/s and a mass of 0.440 kg. cart 2 has a mass of 0.740 kg. (a) if the total momentum of the system is to be zero, what is the initial speed of cart 2

Explanation:

It is given that,

Mass of cart 1,

Mass of cart 2,  

Speed of cart 1,

If the total momentum of the system is zero, the initial momentum is equal to the final momentum as :

Let is the initial speed of cart 2

Initial speed of the cart 2 is 1.308 m/s and it is moving in opposite direction of the cart 1.

at right angles to each other

electrical potential energy =0.072 j

explanation:

electrical potential energy is given by

u= q δv

q= charge=6 c

δv= potential difference and is given by

δv= e d

e= electric field

d= distance=5 mm=0.005 m

δv=2.4 (0.005)=0.012 v

now electric potential energy= u= q δv

u=6 (0.012)

u=0.072 j