10. Conservation of Energy

Which of the following is the best example of the law of conservation of energy?

Which of the following best states the law of conservation of energy?

A sled starts from rest at the top of the frictionless, hemispherical, snow-covered hill shown in FIGURE P10.56. a. Find an expression for the sled's speed when it is at angle ϕ .

Which of the following is an example of conservation of energy resources?

Which statement best describes the law of conservation of energy?

Which of the following best describes the requirement of the law of conservation of energy in a closed system?

A novice skier, starting from rest, slides down an icy frictionless 8.0° incline whose vertical height is 115 m. How fast is she going when she reaches the bottom?

Which of the following scenarios best adheres to the law of conservation of energy ($E=\mathrm{constant}$)?

Which of the following statements is true according to the law of conservation of energy ($E$)?

According to the law of conservation of energy, which of the following statements is correct?

In the high jump, the kinetic energy of an athlete is transformed into gravitational potential energy without the aid of a pole. With what minimum speed must the athlete leave the ground in order to lift his center of mass 2.10 m and cross the bar with a speed of 0.50 m/s?

A sled is initially given a shove up a frictionless 18.0° incline. It reaches a maximum vertical height 1.22 m higher than where it started at the bottom. What was its initial speed?

A 62-kg trampoline artist jumps upward from the top of a platform with a vertical speed of 4.5 m/s. How fast is he going as he lands on the trampoline, 2.0 m below (Fig. 8–32)? <IMAGE>

(I) A 16.0-kg child descends a slide 2.20 m high and, starting from rest, reaches the bottom with a speed of 1.15 m/s. How much thermal energy due to friction was generated in this process?