"APPLIED PHYSICS: MOTION of PROJECTILES in UNIFORM GRAVITY. Without air resistance, a projectile shot off at an angle Θ with respect to a flat surface has a range RANGE and time of filght TOF that depends on its initial velocity, V0, gravity G and the angle of elevation Θ. * * * shot at * * velocity / * * V0 / * * / *___< Θ___________________________*_ hits surface at time TOF Use these equations when initial velocity and angle of elevation are known. G=gravity: 32 ft/s^2 or 9.8 m/s^2, V0=initial velocity, THETA is the angle of elevation in degrees. (c) Copyright PCSCC, Inc., 1993 *** Answer to problem *** Type ? then (esc) 0 (enter) to set all variables to zero. Set the gravity to 32ft/s. Move the cursor to Θ and set the angle to 40 degrees. Move the cursor to the initial velocity V0 and set it to 70 ft/s. The distance is RANGE=150.8 ft and the arrival time is TOF=2.82 s. Type any key to exit. ||A football is thrown with a perfect spiral at an initial velocity of 70 ft/s an at an angle of 40 degrees with respect to the horizontal.(a) How far away should the receiver be. (b) How long will it take to arrive? Type comma key to see answers. Type (F2) to return to application file."
