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Physics question: projectile motion

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A soccer player kicks a ball at an intial speed of 11.0 m/s at an angle of 40.0 degrees to the ground.

a) How far will the ball travel horizontally?

b) How long is it in the air?

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Solution Preview

a.) The horizontal displacement of the ball
R = u^2*sin(2Theta)/g

u = ...

Solution Summary

This answer is provided in 62 words. It uses brief equations to find displacement and time of the ball once it has been kicked.

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Physics: Projectile motion for a spear in flight

A spear is thrown upward from a cliff 48 m above the ground. Given an initial speed of 24 m/s at an angle of 30º to the horizontal,
a. how long is the spear in flight?
b. what is the magnitude and direction of the spear's velocity just before it hits the ground?

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