A spring has a spring constant of 20 N/m. If the spring is pulled 0.50 meters to stretch the spring. What force is exerted on the spring? Recall that Hooke’s Law if F=kx. Assume a frictionless surface.

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?

Which of the choices below is one of the primary gases found in the atmosphere? a. helium b. carbon dioxide c. nitrogen d. argon

One form of energy can be another type of energy. a. created to form b. transformed into c. destroyed and then created to form