An empty bucket slides across a frozen frictionless pond. It begins to rain and water starts to collect in the bucket. What will happen to the bucket's speed? Explain

A cylinder was dropped vertically from rest in a very high, evacuated tube near the surface of the earth. The mass of the cylinder is 6kg. What is its speed after the cylinder has fallen 4.0 m? 7 m/s В 11 m/s C) 2 m/s 9 m/s

Suppose that you and two classmates are discussing the design of a roller coaster. One classmate says that each summit must be lower than the previous one. Your other classmate says this is nonsense, for as long as the first one is the highest, it doesn’t matter what height the others are. What do you say?

2F The total mechanical energy of an isolated system is conserved as long as nothing in the system is moving everything in the system moves at a constant speed there are no dissipative forces such as air resistance and friction acting within the system the temperature of the system is zero O nothing in the system is moving O everything in the system moves at a constant speed there are no dissipative forces such as air resistance and friction acting within the system there are no dissipative forces such as air resistance and friction acting within the system

Suppose you are designing a traditional wooden roller coaster. Which is better: having the biggest hill at the beginning of the ride or at the end? Explain your answer in terms of energy (not thrills).

A woman swimming upstream is not moving with respect to the shore. Is she doing any work? If she stops swimming and merely floats, is work done on her? Explain comprehensively.

1. The sledder shown in figure starts from the top of a frictionless hill (Point A) with an initial speed of 30 m/s and slides down into the valley. What is the final speed at the top of the next hill (Point B)? 30 m/s A 100 m 130 m O 30 m/s We cannot solve this problem without knowing the mass of the sledder. O 17.7 m/s O 12.5 m/s O 23.8 m/s

You exert a quick push on a 20-g ice cube horizontally along the top of a smooth incline so that it starts moving at a speed of 0.80 m/s, as shown in the figure. After you stop pushing it, the cube slides down the incline as shown in the figure. Calculate the speed of the ice cube when it reaches the bottom of the incline.

-ssenger X s/6431259212/mydocument of Energy - 17571154 ✩ Extensions Help Last edit was made 8 minutes ago by Sumayya Ahmed Arial 1 H 14 + L T BI U A GE 2 U 31 二 三 三 三月 45 Submit Assic 6 ✓= 2) A roller coaster has a mass of 600kg. It drops from a hill of height 80m. At the top of the hill, it has zero velocity. How fast is it going when it reaches the bottom? !!! Student Help Desk | Schoology Blog | PRIVACY P (99+

Two balls having different masses reach the same height when shot into the air from the ground. If there is no air drag, which of the following statements must be true? (More than one statement may be true.) A. Both balls left the ground with the same speed. B. Both balls left the ground with the same kinetic energy. C. Both balls will have the same gravitational potential energy at the highest point. D. The heavier ball must have left the ground with a greater speed than the lighter ball. E. Both balls have no acceleration at their highest point.