From Calgary, Sandy travels 10km north for 15 minutes to the mall, and stops for lunch for 45min. After lunch it takes Sandy another 15 minutes to drive towards the nearest library at 9.0km away north of the mall. When she reached the library, she realized that she had forgotten her books. And travels 30 minutes to home south, 19km away. What is her average velocity? What is her average speed?

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?

Ablock of mass m = 2.5 kg is attached to a spring with spring constant k = 710 n/m. it is initially at rest on an inclined plane that is at an angle of θ = 23° with respect to the horizontal, and the coefficient of kinetic friction between the block and the plane is μk = 0.19. in the initial position, where the spring is compressed by a distance of d = 0.16 m, the mass is at its lowest position and the spring is compressed the maximum amount. take the initial gravitational energy of the block as zero. a) what is the block's initial mechanical energy? b) if the spring pushes the block up the incline, what distance, l, in meters will the block travel before coming to rest? the spring remains attached to both the block and the fixed wall throughout its motion.

Aregular polygon has angkes of size 150° each.how many side has the polygon