Một hình chữ nhật kích thước 3cm×4cm đặt trong từ trường đều có cảm ứng từ B=5.10^-4 vectơ cảm ứng từ hợp với mặt phẳng một góc 30° từ thông qua hình chữ nhật đó là

Aprojectile is launched horizontally 10m above the ground and with an initial velocity of 15 m/s. a) sketch the trajectory using an appropriate coordination system. b) how long for the projectile to reach the ground. c) how far did projectile travel horizontally before striking the ground. d) determine the projectilex & y position at t-1.3s e) determine the magnitude and direction of projectile velocity at t= 1.3s f) determine the magnitude and direction of projectile acceleration at t-1.3s

The 20@kg wheel has a radius of gyration about its center g of kg = 300 mm. when it is subjected to a couple moment of m = 50 n # m, it rolls without slipping. determine the angular velocity of the wheel after its mass center g has traveled through a distance of sg = 20 m, starting from rest.

Explain earth's motion, using the terms "precession" and "rotation" in your answer.