A frictionless simple pendulum, with a small but dense 4.4-kg mass at the end and a length of 75 cm, is released from rest at an angle of 50° with the vertical. (a) To what height above its lowest point does the mass swing on the other side? (b) What is the speed of the mass at the bottom of the swing?

Current Attempt in Progress In the figure, a spring with spring constant k = 180 N/m is at the top of a frictionless incline of angle = 36°. The lower end of the incline is distance D = 0.98 m from the end of the spring, which is at its relaxed length. A 1.7 kg canister is pushed against the spring until the spring is compressed 0.18 m and released from rest. (a) What is the speed of the canister at the instant the spring returns to its relaxed length (which is when the canister loses contact with the spring)? (b) What is the speed of the canister when it reaches the lower end of the incline? (a) Number i (b) Number i Ө Forord Units Units

(a) A 15.0 kg block is released from rest at point A in the figure below. The track is frictionless except for the portion between points B and C, which has a length of 6.00 m. The block travels down the track, hits a spring of force constant 2,100 N/m, and compresses the spring 0.250 m from its equilibrium position before coming to rest momentarily. Determine the coefficient of kinetic friction between the block and the rough surface between points B and C. 3.00 m A m B -6.00 m- Ⓡ (b) What If? The spring now expands, forcing the block back to the left. Does the block reach point B? O Yes O No If the block does reach point B, how far up the curved portion of the track does it reach, and if it does not, how far short of point B does the block come to a stop? (Enter your answer in m.)

need Answer only for (d)