Physics equations/07-Work and Energy/Q:cart2/More practice

{The spring constant is 628 N/m, and the initial compression is 0.176 m What is the mass if the cart reaches a height of 1.86m before coming to rest? -a) 0.3 kg -b) 0.35 kg -c) 0.4 kg -d) 0.46 kg +e) 0.53 kg {The cart has a mass of 3.23 kg. It is moving at a speed of 2.03 m/s when it is at a height of 2.92 m.  If the spring constant was 471 N/m, what was the initial compression? -a) 0.43 meters. -b) 0.49 meters. -c) 0.56 meters. +d) 0.65 meters. -e) 0.75 meters.
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{You are riding a bicycle on a flat road. Assume no friction or air drag, and that you are coasting. Your speed is 5.473 m/s when you encounter a hill of height 1.373 m. What is your speed at the top of the hill? -a) 1.22 m. -b) 1.48 m. +c) 1.74 m. -d) 2.01 m. -e) 2.27 m.
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{The spring constant is 792 N/m, and the initial compression is 0.192 m What is the mass if the cart reaches a height of 1.58m before coming to rest? +a) 0.94 kg -b) 1.08 kg -c) 1.25 kg -d) 1.43 kg -e) 1.65 kg {The cart has a mass of 3.17 kg. It is moving at a speed of 2.18 m/s when it is at a height of 2.77 m.  If the spring constant was 534 N/m, what was the initial compression? -a) 0.34 meters. -b) 0.39 meters. -c) 0.45 meters. -d) 0.51 meters. +e) 0.59 meters.
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{You are riding a bicycle on a flat road. Assume no friction or air drag, and that you are coasting. Your speed is 5.232 m/s when you encounter a hill of height 1.281 m. What is your speed at the top of the hill? -a) 1.05 m. -b) 1.28 m. +c) 1.51 m. -d) 1.73 m. -e) 1.96 m.
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