4. Angelo was choosing springs to use their door. He noticed that spring A was stiffer than spring B; that is ka> kB. Which spring will have more elastic potential energy stored if (a) they are compressed the same distance and (b) if the same force is applied on them?
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- 4. A 3kg block sits on a ramp, against a spring. I pull back on the block, compressing the string by 4cm, and the block moves 1.4m up the ramp, so that it is 0.5m higher than it was before, before it stops. If the force of kinetic friction on the block from the ramp is K = 7N, find the spring constant k. Ef = Ei 0.5m + 1.4m W@ 108 W K F 25,551 A 3 E D 80 7 C 6. A 90.0-kg circus performer jumps from a height 5.30 m onto a trampoline and it stretches 0.35 m. Assume that the trampoline obeys Hooke's Law. How far will it stretch if the performer jumps from a height 8.0 m? ADE and Santi 2010ning $ MAR 2 22 R 888 FA F V % 5 FS T G m 6 tv B MacBook Air F Y H & 7 34 F7 U N ** 8 J Dil 66 1 3 ( 9 A K DD FO MOSISO O W F10 P P zoom command e FM - EA vawes or roe puffer 12 2 ISUH H by mi 04 M option1. A heavy crate (m = 23 kg) is resting on a frictionless inclined plane while suspended from a wall by a spring. The plane is inclined at an angle of 30° from the horizontal, and the spring is stretched from its equilibrium position by 25 cm. What is the spring constant of the spring? If the frictionless inclined plane is now replaced with an otherwise identical plane except with a rough surface, the crate now stretches the spring by 12 cm from its equilibrium position. What is the coefficient of static friction? You can assume that the static friction is at its maximum value. 30°
- A 2.6kg box is sliding along a frictionless horizontal surface with a speed of 1.8m/s when it encounters a spring. A. Determine the force constant of the spring if the box compresses the spring 7.50cm before coming to rest. B. Determine the initial speed the box would need to be in order to compress the spring by 1.30cm9 Spaceman Spiff lost his ship's altimeter during a freak meteor storm, but he needs to know when to deploy his retro rockets to insure a safe landing back on earth. Luckily, he has his trusty toy dart gun whose spring has a 110 N/m spring constant. He loads his 7.2 gram suction cup dart, compresses the spring 4.0 cm, takes vertical aim at the cabin ceiling, and shoots. The suction cup dart flies 1.47 meters above its initial spring-compressed position. What is Spiff's altitude above earth? aQUESTION 9 When a spring is compressed or stretched, the elastic potential energy (U=1/2kx²) of the spring: Oa. Stays constant Ob. Decreases Oc Increases Od. Either positive or negative
- a) A friend says they have a spring that stretches 5cm every 1 N that is applied. If they stretch the spring to 10 cm (double the distance), how does the spring constant change? b) If given 2 springs, how can you tell which has a greater spring constant without takinG measurements?9. A 7.9 kg object is suspended 10 m above the ground. Directly beneath it is a spring with a spring constant of 6500 N/m. Qualitatively describe what occurs to the energy of the system once the object is released? (Hint: Consider what occurs as the object falls, encounters the spring, and if it will go back up again!)Please answer and solve the question correctly. Thank you!