Cho vật m đặt trên mặt phẳng ngang nhẵn, được kéo bởi lực F=50N, nghiêng một góc =30 độ. biết phản lực do mặt sàn tác dụng lên vật có giá trị 15N. Trọng lượng của vật là?

When a 5.0kg cart undergoes a 2.2m/s increase in speed, what is the impulse of the cart

Two steel balls, each of mass m, are welded to a light rod of length l and negligible mass and are initially at rest on a smooth horizontal surface. a horizontal force of magnitude f is suddenly applied to the rod as shown. determine (a) the instantaneous acceleration a of the mass center g and (b) the corresponding rate at which the angular velocity of the assembly about g is changing with time.

Ben (55kg) is standing on very slippery ice when junior (25kg) bumps into him. junior was moving at a speed of 8 m/s before the collision and ben and junior embrace after the collision. find the speed of ben and junior as they move across the ice after the collision. give the answer in m/s. describe the work you did to get the answer.