A 700 kg car is moving at 10 m/s west rear ends a 500 kg car at rest. They both stuck together after the collision and continue to move. How fast are they both moving together after the collision?

Explanation:

The collision is inelastic and can be described by the Principle of Momentum Conservation:

The speed after the collision is:

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

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