Tilted Forum Project Discussion Community - View Single Post - physics projectile motion and uniform circular motion

threewingedfury · 09-18-2006, 01:18 PM

Ok I had a test today with these questions on it, and I'm completly lost

A projectile reaches its maximum height two seconds after launch. At its max height its speed is 10 m/s.

How far does the particle travel?
What are the x and y components?
How high does it go?

Is it safe to say that the particle travels 40 m because of conservation of energy, because I figured 10 m/s was the initial velocity too?
Is the x component 10i and y component 0j?
I did v^2-vo^2/2a and figured it reached 5.1 m, is this correct?

A particle is in uniform circular motion about the origin of an x-y coordinate system moving clockwise with a period of 7 seconds. At one instant its position vector is 2i-3j

Find speed and magnitude of the acceleration.

I completely dont understand this one!

09-18-2006, 01:18 PM	#1 (permalink)
threewingedfury Upright	physics projectile motion and uniform circular motion Ok I had a test today with these questions on it, and I'm completly lost A projectile reaches its maximum height two seconds after launch. At its max height its speed is 10 m/s. How far does the particle travel? What are the x and y components? How high does it go? Is it safe to say that the particle travels 40 m because of conservation of energy, because I figured 10 m/s was the initial velocity too? Is the x component 10i and y component 0j? I did v^2-vo^2/2a and figured it reached 5.1 m, is this correct? A particle is in uniform circular motion about the origin of an x-y coordinate system moving clockwise with a period of 7 seconds. At one instant its position vector is 2i-3j Find speed and magnitude of the acceleration. I completely dont understand this one!