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Physics help please!?
Just trying to get ready for this exam!
1) Why does a projectile fired into a vacuum maintain its horizontal component of speed?
2)How does running horizontally affect your hang time? Assume you have the same vertical component of takeoff velocity.
3)A ball is thrown horizontally with a large force; an identical ball is dropped from the same height. Which ball hits the ground first?
4)In the absence of air resistance, at what other angle will a thrown ball go the same distance as one thrown at a 75 degree angle?
Thanks!
1 Answer
- OldPilotLv 77 years agoFavorite Answer
1) Newton's 1st Law. No external force acts on the projectile, so its' velocity does not change.
2) See #1. No external force acts on you and your velocity has no vertical component, thus your hang time does not change.
3) Read #1 and #2 again. They both hit the ground at the same time
4) What angle has the same sine as 2* 75 degrees ( same sine as 140 degrees)? Use your calculator to find the sine of 140 degrees, then take the inverse sine of that number (I get 40 degrees) divide that number by 2 ===> 20 degrees