the muzzle speed of a gun is 160 ft/sec. at what angle of elevation should the gun be fired so that a projectile will hit an object on the same level as the gun and at a distance of 400 ft from it?

Question

anonymous · Answer

So the projectile is the unknown factor?

anonymous · Answer

I think so and it's angle of elevation. Can anyone help me? We're not allowed to use physics concept to solve this problem.We're only allowed to use calculus concept to solve this.

anonymous · Answer

You can't really avoid physics since known variable is speed. At which level the physics is not sllowed?

anonymous · Answer

Honestly, I don't know 'coz I don't have physics subject so far for this semester. I'm so sorry.

anonymous · Answer

Can we say you know about speed definition from calculus, then even if it is physics, you are allowed to use it?

anonymous · Answer

I don't think so. Our instructor wants us to use the formula she had given to us.

anonymous · Answer

If that is the case, tah impossible.
But if you are allowed to use speed=distance/time, there might be a way.

anonymous · Answer

Yes indeed. :(

anonymous · Answer

Here's another one. A ball is thrown horizontally from the top pf the cliff 256 ft. high w/ an initial speed of 50 ft/sec. Find the time of flight of the ball and the distance form the base of the cliff to the point where the ball lands. Thank you! :D

anonymous · Answer

No physics again?

anonymous · Answer

Unfortunately, yes. :(

anonymous · Answer

Hmm, i guess impossible again.
Or maybe you misunderstood your teacher's instruction. Speed definition is general definition from mathematics too.

anonymous · Answer

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anonymous · Answer

Is this the answer?

anonymous · Answer

yes

anonymous · Answer

Okay. Thank you so much!

anonymous · Answer

sure.

anonymous · Answer

Could you please answer this one? The muzzle speed of a gun is 160 ft/sec. at what angle of elevation should the gun be fired so that a projectile will hit an object on the same level as the gun and at a distance of 400 ft from it?
Thank you! :D

anonymous · Answer

I did.

anonymous · Answer

I mean this. Here's another one. A ball is thrown horizontally from the top pf the cliff 256 ft. high w/ an initial speed of 50 ft/sec. Find the time of flight of the ball and the distance form the base of the cliff to the point where the ball lands. Thank you! :D

anonymous · Answer

hey imron07 & IaMEricajynn! I think you both have misunderstandings. Physics can be applied but in this case, the definition of velocity is the first derivative of the position vector. :)) That's how it relates to calculus. Velocity is still the distance over time but that's already given. So don't worry about that anymore.