If a 70 km swimmer pushes of a pool with a force of 215 in the water exhilaration if a 70 km swimmer pushes of a pool wall with a force of 250 n what is her acceleration

Let f(x) = x4- 8x2 . find the relativeextrema of this function using the second derivative test.

Students design a model roller-coaster track. they place a rubber ball at the highest point on the track and let it go. the ball rolls along the track pulled only by the force of gravity. eventually, it comes to a stop. which change to the design will result in the ball moving the greatest distance?

Consider a system to be two train cars traveling toward each other. what is the total momentum of the system before the train cars collide?   kg • what must the total momentum of the system be after the train cars collide?   kg •