Ok I have two questions which I am stuck on. I just need some hints.(adsbygoogle = window.adsbygoogle || []).push({});

1.)An airplane is flying with a velocity of 90.0 m/s at an angle of 23.0m\s above the horizontal. When the plane is a distance 115 m directly above a dog that is standing on level ground, a suitcase drops out of the luggage compartment.

q.)How far from the dog will the suitcase land? You can ignore air resistance

For this one I think I have to calculate the time it takes for the suitcase to hit the ground. And then I can use d=vt to calculate the distance away from the dog. But i am having a problem with the intial velocity in the y direction. When the suitcase falls off the plane its intial velocity is not zero right. Its inital velocity will be the same as the plane right.

2.)A model of a helicopter rotor has four blades, each of length 3.60 m from the central shaft to the blade tip. The model is rotated in a wind tunnel at a rotational speed of 530rev/min.

q1.)What is the linear speed of the blade tip?

q2.)What is the radial acceleration of the blade tip expressed as a multiple of the acceleration of gravity, g?

Really dont know where to start out on this one, just point me in the right direction.

Thanks

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# Homework Help: Projectile motion and circular motion questions

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