Incline Problem: Block Projected Up 35 Degrees, 8.2 ft/s

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A block projected up a frictionless incline at a 35-degree angle with an initial velocity of 8.2 ft/s will experience an acceleration of -g*cos(35) due to gravity. To determine how far it travels up the incline and the time taken, kinematic equations can be applied. The block will return to the bottom of the incline with the same speed of 8.2 ft/s, as energy is conserved in the absence of friction. The discussion also notes that this type of problem is typically suited for a homework forum. Overall, the principles of kinematics and energy conservation are central to solving the incline problem.
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a block is projected up a frictionless inclined plane. the angle of incline is 35 degrees, and the initial velocity is 8.2 ft/s. how far up the plane does the block travel? how long does it take to get there? and what is its speed when it gets back to the bottom?
 
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Shouldn't this be on the homework forum?

Find the acceleration of the body along the incline and use kinematics.
 
I think the acceleration would be -g*cos(35), from that use constant acceleration equations to solve the problem.
 
It will be with sine. Of course with no friction.
 
And due to conservation of energy and lack of friction (external force) without even solving the problem we can say it would come back down with the same speed...
 
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