Afootball quarterback is moving straight backward at a speed of 2.11 m/s when he throws a pass to a player 21.1 m straight downfield. the ball is thrown at an angle of 28.3° relative to the ground and is caught at the same height as it is released. what is the initial velocity of the ball relative to the quarterback? (assume downfield to be in the +x-direction. enter the magnitude in m/s and the direction in degrees counterclockwise from the +x-axis.)

Amass attached to a spring is displaced from its equilibrium position by 5cm and released. the system then oscillates in simple harmonic motion with a period of 1s. if that same mass–spring system is displaced from equilibrium by 10cm instead, what will its period be in this case? a mass attached to a spring is displaced from its equilibrium position by and released. the system then oscillates in simple harmonic motion with a period of . if that same mass–spring system is displaced from equilibrium by instead, what will its period be in this case? a) 0.5sb) 2sc) 1sd) 1.4s