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A 55.0 kg equipment crate is sliding down a loading ramp at a construction site. The ramp is inclined at an angle of 25.0° to the horizontal. The crate experiences a constant frictional force of 85.0 N acting against its motion.
Calculate the magnitude of the acceleration of the crate as it slides down the ramp. In your response, you must: calculate the weight of the crate; resolve the weight into components parallel and perpendicular to the ramp; and determine the net force acting on the crate.
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The diagram below shows a transverse cross-section of the spinal cord and the neural pathway involved when a person accidentally touches a sharp pin.
Explain the functional advantage of the spinal cord acting as the integration centre for this reflex rather than the brain.
Marking Key
Allows for a rapid/fast response to the stimulus.
Because there is a shorter neural pathway / fewer synapses involved compared to conscious processing by the brain.
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