A huge asteroid that is moving at an incredibly fast speed impacts the Earth, will this change the momentum of the Earth? Explain.

Acar travels along a highway with a velocity of 24 m/s, west. the car exits the highway; and 4.0 s later, its instantaneous velocity is 16 m/s, 45° north of west. what is the magnitude of the average acceleration of the car during the four-second interval?

Name three different units of energy used to measure heat and describe what type of situations each is usually used.

An object has a weight of 500 on earth what is the mass of this object