LEARN MORE REMARKS Notice that it wasn\'t necessary to compute the velocity gain

Question

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REMARKS Notice that it wasn't necessary to compute the velocity gained upon leaving the spring: only the mechanical energy at each of the two points of interest was required, where the block was at rest.

QUESTION A real spring will continue to vibrate slightly after the mass has left it. How would this affect the results? (Select all that apply.)

1. It results in less energy being transferred to the block.

2. It has no effect on the speed of the block.

3. It increases the speed of the block as it leaves if the spring happens to vibrate outward at the right time.

4. It decreases the maximum height of the block.

5. It increases the maximum height of the block.The departing block leaves at a lower speed.

PRACTICE IT

(a) Find the maximum distance d the block travels up the frictionless incline if = 30.0°.
m

(b) How fast is the block going when halfway to its maximum height?
m/s

EXERCISEHINTS

A 1.38 kg block is shot horizontally from a spring, as in the example above, and travels 0.482 m up a long a frictionless ramp before coming to rest and sliding back down. If the ramp makes an angle of 45.0° with respect to the horizontal, and the spring originally was compressed by 0.17 m, find the spring constant.
N/m

Explanation / Answer

It results in less energy being transferred to the block.
It decreases the maximum height of the block.
The departing block leaves at a lower speed.

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