Two carts, of inertias m1 and m2, collide head-on on a low-friction track. before the collision, which is elastic, cart 1 is moving to the right at 14 m/s and cart 2 is at rest. after the collision, cart 1 is moving to the left at 6 m/s . if the positive direction is from left to right, what is the speed of cart 2 after the collision?

Explanation:

As we know that momentum is always conserved in this type of collision

so we will have

so here we will have

also by the coefficient of restitution we know

so we have

come closer and become far apart and become steam/gas

when a device is used in a circuit in which the voltage is 81 v, the current flowing through the device is 3 a. what is the resistance of the device?

a. 27 ω

b. 40.5 a

c. 243 ω

d. 243 a

the correct answer is a. 27