A block is projected up and to the right along a frictionless inclined plane with initial speed vo = 3.50 m/s. The angle of incline is 0 30.0°. (a) How far up the plane does the block go? (b) How long does it take to get there? (c) What is its speed when it gets back %3D to the bottom? Create the free-body diagram. Please use the blue vector to specify forces and the pink vector for acceleration.

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The horse pulls the cart and the cart pulls the horse in response as per Newton third law. So the big question is, “Don’t the two forces cancel each other? How does the cart accelerate?”