[الخاطري]

from what height must water fall to strike a turbine wheel with a vertical downward velocity of 30 m/s






a boy standing beside a tall building throws a ball straight up with an initial velocity of 15 m/s
a)how high will the ball rise
b)how long will it take for the ball to reach it is maximum height





the centers of two 10kg spheres are separated by 0.1 m . what is their gravitational attraction





an ice hockey player strikes a puck of mass 0.17 kg with his stick , accelerating it along the ice from rest to a speed of 20 m/s over a distance of 0.5 m . what force must he exert if the frictional force between the puck and the ice is negligible



بلييييييييز ساعدوني
مره محتاجه مساعده :mommy_cut: