Hey, could you please help me with those questions?

A sled is pulled up to the top of a hill. The sketch above indicates the shape of the hill. At the top of the hill the sled is released from rest and allowed to coast down the hill. At the bottom of the hill the sled has a speed v and a kinetic energy E [the energy due to the sled's motion}. Friction and air resistance are so small they can be ignored. The sled is pulled up a steeper hill of the same height as the hill described above. How will the velocity of the sled at the bottom of the hill [after it has slid down] compare to that of the sled at the bottom of the original hill? Choose the best answer below. {:1 The speed at the bottom is the same for both hills. {:3 The speed at the bottom is greater for the steeper hill. C} The speed at the bottom is greater for the original hill because the sled travels further. {3 There is not enough information given to say which speed at the bottom is faster. {:1 None of these descriptions is correct. A sled is pulled up to the top of a hill. The sketch above indicates the shape of the hill. At the top of the hill the sled is released from rest and allowed to coast down the hill. At the bottom of the hill the sled has a speed v and a kinetic energy E (the energy due to the sled's motion). Friction and air resistance are so small they can be ignored. The sled is pulled up a second and higher hill that is less steep than the original hill described above. How does the speed of the sled at the bottom of the second hill (after it has slid down) compare to that of the sled at the bottom of the original hill? O The speed at the bottom is greater for the higher but less steep hill than for the original. O The speed at the bottom is the same for both hills. O The speed at the bottom is greater for the original hill. O There is not enough information given to say which speed at the bottom is faster. O None of these descriptions is correct.Two ice skaters face each other in an Olympics doubles figure skating event. Skater 1 has a mass of 40. kg and skater 2 has a mass of 55 kg. Skater 2 pushes skater 1 with a force of magnitude (F) so that skater 1 moves backward at a speed of 5.0 m/s. As a result of the push, the speed of skater 2 is: (note: ignore friction due to the skates on the ice) O 3.6 m/s O 11 m/s O 2.6 m/5 0 0 m/sTwo balls approach each other with equal speeds of 25 m/s. One ball has a mass of 7.0-kg and the other has a mass of 14.0-kg. They collide in a perfectly inelastic collision. The speed of the balls just after the collision is approximately: O 8.3 m/s O 1.2 m/5 O 37.5 m/s 0 0 m/sA cable car with a mass of 6300-kg in Los Angeles (CA) is pulled a distance of 560 m along a cable up a hill inclined at 120 from the horizontal. The change in the potential energy of the car is O 7.2 x10^6 O 7.3 x10^5 O 3.5 x10^7 O 4.2 x10^7A block attached to a spring is oscillating between point x (fully compressed) and point y (fully stretched). The spring is un-stretched at point 0. X O At point 0, which of the following quantities is at its maximum value? O The block's kinetic energy O The blocks potential energy O kinetic energy and potential energy O neither kinetic energy nor potential energy