How to find the net force, acceleration, and speed of Hovercraft?

AI Thread Summary
The discussion focuses on calculating the net force, acceleration, and final speed of a toy hovercraft with a mass of 914g and two fans exerting a force of 0.38 N each. The net force can be determined by summing the forces from the fans, assuming no friction. To find the acceleration, the equation F=ma is applied, where 'F' is the net force and 'm' is the mass in kilograms. The final speed after operating the fans for 5.0 seconds can be calculated using time-dependent kinematics. Understanding the orientation of the fans is crucial for accurately determining the net horizontal force.
turtle4yj
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A toy hovercraft has a mass of 914g. Each of the two fans pushes back on the air with a force of 0.38 N.

a. If there's no friction acting on the hovercraft, what is the net force acting on it?
b. What is the acceleration of the hovercraft?
c. If you start with the hovercraft at rest, and operated the fans for 5.0 , what will the final speed of the hovercraft be?

I think I'm supposed to get an equation for the net force but I'm not sure how to find the equation. The rest of them, I'm not so sure.
 
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How are the fans oriented?
 
Both fans are pointing towards one side
 
Are they oriented at an angle? If so, use vector algebra to find the net horizontal force. Then remember F=ma and time-dependent kinematics for the other two.
 
So if the hovercraft was a box shape, the fans are both oriented at 90 degree angles in the same direction.
 

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