Una pelota de fútbol que tiene una masa de 400 gramos , cae libremente desde una altura de 20 metros respecto del suelo, choca y en el rebote pierde el 40 % de su rapidez.
A) Con que velocidad llego al suelo.
B) ¿Cuál es el valor del momentum de la pelota en el instante de impactar con el suelo?
C) ¿Cuál es el valor de momentum de la pelota ,justo después del rebote?
D) ¿Cuánto vale la variación de momentum de la pelota durante la interacción con el
suelo?

Polygons efgh and e′f′g′h′ are shown on the coordinate grid: what set of transformations is performed on efgh to form e′f′g′h′? a. a translation 1 unit to the left followed by a 90-degree counterclockwise rotation about the origin b. a translation 1 unit to the right followed by a 90-degree counterclockwise rotation about the origin c. a 90-degree clockwise rotation about the origin followed by a translation 2 units to the right d. a 90-degree clockwise rotation about the origin followed by a translation 2 units to the left

The scatterplot below shows the number of hours that students read weekly and the number of hours that they spend on chores weekly. which statement about the scatterplot is true?

Apiling for a high-rise building is pushed by two bulldozers at exactly the same time. one bulldozer exerts a force of 1250 pounds in a westerly direction. the other bulldozer pushes the piling with a force of 2650 pounds in a northerly direction. what is the direction of the resulting force upon the piling, to the nearest degree? a. 65 n of w b. 25 n of w c. 45 n of w d. 35 n of w