Projectile motion

  • Thread starter actingjsg
  • Start date
  • #1
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i have a few questions that i need help with. thanks! =)


A diver dives from the edge of a swimming pool and lands in the pool 5.7 m away 0.82 seconds later. With what speed did the diver dive? at what angle? assume the diver lands at the same height he started from.


A 2m tall basketball player shoots a ball at an angle of 51 degrees from horizontal. He released the ball even with the top of his head. It passes through the rim (3.05 m above the floor) 1.1 seconds later. How far was the player from the basket?

A baseball is hit at 30 m/s at an angle of 53 degrees. At the instand the ball was hit, an outfielder runs towards the infield at a constant velocity of 4.0 m/s and catches the ball at the same height from which it was hit. How far was the outfielder initially from the batter?


Can someone explain how to do this/what the answer would be?
 

Answers and Replies

  • #2
2,210
1
MooMansun said:
Looks like homework. :)
1. speed= Distance / time.
5.7 m / 0.82 seconds = 6.951219512195121951219512195122 m/sec.
As for the rest I think this should help...
http://en.wikipedia.org/wiki/Trajectory_of_a_projectile

Thats actually incorrect. From looking at your other thread, your understanding of physics isnt really one which gives you a position to be helping people..:rolleyes: :frown:
 
  • #3
Diane_
Homework Helper
390
1
actingjsg - Can you tell us what you've tried already?

Edit: Oh, wait. I already said that. I take it you posted this elsewhere as well, and it was moved here? Well, now I feel like a doofus. Please pick one of the threads and let us know where you are.
 
  • #4
30
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Average speed= Distance / time is incorrect???
 
  • #5
Diane_
Homework Helper
390
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It is correct, but it's not particularly helpful when the object is accelerating.
 
  • #6
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Oh, right. I see your problem.

I'll try to be more specific if replying to someone, sorry.
 
  • #7
Gokul43201
Staff Emeritus
Science Advisor
Gold Member
7,082
20
MooMansun said:
Average speed= Distance / time is incorrect???
The number given is not even the total distance traversed; it is the total displacement.
 

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