...(College Physics is hard)? In the javelin throw at a track and field event, the javelin is launched at a speed of 29 m/s at an angle of 36 degree above the horizontal. As the javelin travels upward, its velocity points above the horizontal at an angle that decreases as time passes. How much time is required for the angle to be reduced from 36 to 18 degrees? (Answer .96 sec)
After leaving the end of a ski ramp, a ski jumper lands downhill at a point that is displaced 51 meters horizontally from the end of the ramp. His velocity, just before landing is 23 m/s and points in a direction 43 degree below the horizontal. Neglecting air resistance and any lift he experiences while airborne, find his initial velocity (magnitude and direction) when he left the end of the ramp. (Answer 21.9 m/s, 40 degrees)
After leaving the end of a ski ramp, a ski jumper lands downhill at a point that is displaced 51 meters horizontally from the end of the ramp. His velocity, just before landing is 23 m/s and points in a direction 43 degree below the horizontal. Neglecting air resistance and any lift he experiences while airborne, find his initial velocity (magnitude and direction) when he left the end of the ramp. (Answer 21.9 m/s, 40 degrees)