Can you help me with these physics questions 3. An object is thrown horizontally with a velocity of 25 m/s. After 5 seconds the ball has fallen some distance. What is the final horizontal and vertical velocity of the ball?

4. A plane can fly at 200 km/h in still air. If the wind is blowing at 75 km/s what will be the speed of the plane when it heads into the wind? If it flies this way for 3 hours how far will it have travelled?

5. The highest mountain on mars is Olympus Mons rising 22,000 meters. If we were to throw an object horizontally off the mountaintop how long would it take to reach the surface? (gravity on Mars is 3.7 m/s2)

6. Divers at Acapulco dive from a cliff that is 61 m high. If the rocks below the cliff extend outward for 23 m, what is the minimum horizontal velocity a diver must have to clear the rocks safely? Assume the diver jumps perfectly horizontally. Answer in units of m/s.

7. A plane drops a hamper of medical supplies from a height of 4250 m during a practice run over the ocean. The plane's horizontal velocity was 125 m/s at the instant the hamper was dropped. What is the magnitude of the overall velocity of the hamper at the instant it strikes the surface of the ocean?

8. A brick is thrown upwards from the top of a building at an angle of 25° above the horizontal and with an initial sped of 15 m/s. If the brick is in flight for 3.2 s, how tall is the building? Answer in units of m.