1.A student wishes to weigh himself but has access only to a scale A with capacity limited to 100-lbs and a small 20-lb spring dynamometer B. he realizes that when he exerts a pull on the rope, so the dynamometer registers 19 pounds. the scale A reads 67 lbs. what is his correct weight?
2.A particle has an initial speed of 27m/s. If it experiences a deceleration of (-6t)m/s^2, where t is in seconds, determine its velocity after it has traveled 10 meters. How much time does this take?
3.An offshore drilling rig is being towed out to sea. What is the maximum distance away that the navigation lights can still be seen by an observer standing at the shoreline? The observer's eye height is 5'8", and the uppermost navigation light is 130 ft above the water.