Instruction: Solve the following problems. Show your solutions. (10pts each]) 1. You normally drive on the freeway between Quezon City and province of Rizal at an average speed of 75kph and the trip takes 1h and 50 min. On a Friday afternoon, however, heavy traffic slows you down and you drive the same distance at an average speed of only 50kph. How much longer does the trip take? Final answer must be in his and mins. 2. Solve the following: (a) Find the range x of a gun which fires a shell with muzzle velocity v at an angle of elevation 0. (b) Find the angle of elevation 0 of a gun which fires a shell with a muzzle velocity of 150 m/s and hits a target on the same level but 2000 m distant. 3. An 800-kg car is moving on a level road at 40 m/s (a) How large a retarding force (assumed constant) is required to stop it in a distance of 80 m? (b) What is the minimum coefficient of friction between tires and roadway if this is to be possible? Assume the wheels are not locked, in which case we are dealing with static friction - there's no sliding. 4. Compute the work done against gravity by a pump that discharges 750 liters of fuel oil into a tank 25m above the pump's intake. One cubic centimeter of fuel oil has a mass of 0.94g. One liter is 1000 cm*3. 5. A 1200kg sports car is moving westbound at 40m/s on a level road when it collides with a 6400-kg truck driving east on the same road at 20m/s. The two vehicles remain locked together after the collision. (a) What is the velocity (magnitude and direction) of the two vehicles just after the collision? (b) At what speed should the truck have been moving so that it and the car are both stopped in the collision