It is very difficult to generate simple harmonic motion in a real world environment. Explain why this is the case. I REALLY NEED HELP

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?

When a 5.0kg cart undergoes a 2.2m/s increase in speed, what is the impulse of the cart

Asap time is ! best answer gets compose at least one well-developed paragraph on the following: define the term concurrent powers, and give an example of a concurrent power of government.