Free Fall How could knowing this gravity stuff

Free. Fall How could knowing this gravity stuff help you outside school?

Equations Velocity (falling) v=g*t v= velocity in meters / second g= acceleration of gravity (9. 8 m/s 2) t= time in seconds How fast you go when falling

Equations Distance (falling) d = ½ * g * t 2 d= distance in meters g= acceleration of gravity (9. 8 m/s 2) t= time in seconds How far you fall when falling

practice Calculate the speed of an apple that fall freely from a rest position for 1. 5 sec How far did it fall before it hit the ground?

Freefall practice problems n 1. Aunt Minnie gives you $10 per second for 4 seconds. How much money do you have after 4 sec? 2. A ball dropped from rest picks up speed at 10 m/s. After it falls for 4 sec. , how fast is it going? n 3. You have $20 and Uncle Harry gives you $10 each second for 3 seconds. Now how much money do you have? n 4. A ball is thrown straight down with an initial speed of 20 m/s. After 3 sec, how fast is it going? n 5. You have $50, and you pay Aunt Minnie $10/sec. When will your money run out? n 6. You shoot an arrow straight up at 50 m/s. When will it run out of speed? n 7. What will it’s speed be 5 sec after you shoot it? Why? 8. What will it’s speed be 6 sec after you shoot it? 7 sec? 10 sec? n 9. How high was the arrow when it ran out of speed? 10. How high will the arrow be 7 sec after being shot up at 50 m/s? n

More freefall practice n 1. Aunt Minnie drops a penny into a wishing well, and it falls for 3 seconds before hitting the water. How fast is it going when it hits? n 2. How far down is the water surface? n 3. Calculate the average velocity of the penny n 4. Calculate your ‘hang time’ Stand facing a wall with your feet flat on the floor and arms extended upward. Stick a sticky note on the wall at the top of your reach. Jump by bending your knees and jumping straight up, sticking another note as high as you can. Measure the distance between these two markers (if it is over. 6 meters (2 ft) , your exceptional. ) ( no running jumps !! ) A. What is your vertical jumping distance B. Use d=. 5 gt 2 to calculate your hang time ( remember to double your distance because hang time includes going both up and back down. ) n n