A car accelerates Uniformly from an initial velocity of 4 m/s to final velocity of 10 m/s in 8 seconds. It then slows down uniformly to a final Velocity of 6m/s in 5 seconds. Calculate the acceleration of the car during the first 8 seconds and
during the last 5 seconds

please urgent​

Ablock of mass m = 2.5 kg is attached to a spring with spring constant k = 790 n/m. it is initially at rest on an inclined plane that is at an angle of 28 degrees with respect to the horizontal, and the coefficient of kinetic friction between the block and the plane is k = 0.14. in the initial position, where the spring is compressed by a distance of a = 0.18 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. 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.

Science and technology are interdependent. advances in one lead to advances in the other. give an example of this phenomenon.

Astone is dropped from a cliff and falls 9.44 meters. what is the speed of the stone when it reaches the ground? a. 13.6 m/sec b. 1.39 m/sec c. 185 m/sec d. 9.80 m/sec