iff the ball is released what will be its speed at the lowest point of its path? b) a peg is located at distance h directly below the point of attachment of the cord. If h= 0.80l, what will be the speed of the ballwhen it reaches the top of its circular path about the peg?

1. A roller-coaster car with a mass of 1200 kg starts at rest from a point 20 m above the ground. At point B, it is 9 m above the ground. [Express your answers in kilojoules (kJ).] a. What is the initial potential energy of the car? b. What is the potential energy at point B? c. If the initial kinetic energy was zero and the work done against friction between the starting point and point B is 40 000 J (40 kJ), what is the kinetic energy of the car at point B 2. The time required for one complete cycle of a mass oscillating at the end of a spring is 0.80 s. What is the frequency of oscillation?

A roller coaster car travels with a speed of 2.29 m/s at point A, located 10.7m above the ground. Calculate how fast the roller coaster is moving when it reaches point D, 10.7m below point A. Assume the roller coaster is ideal and loses no energy to friction.

A ball of mass m = 6 kg is dropped from a height (hi = 10 m) above the ground. Find the speed of the ball when it is at a height (hf = 4 m) above the ground.

A small box with mass m is released from rest by a spring compressed a 3. distance d. The spring constant is k. After being released, the object slides along a frictionless track. What is the speed of the box when it reaches point B at height h/2? What must be the value of d so that the box comes to rest at the top of the track at point C? Law B h m Application A

a) Find the minimum height h in terms of R so that the cart passes through point A barely without detaching itself from the loop. b) What is the speed of the car at point A if h = 10 m? h A R

A particular spring on the Earth is found to have a spring constant of k = 1400 N/m. If the same spring is taken to Marsa. The spring constant will be less than on Earthb. The spring constant will be the same as on Earthc. The spring constant will be more than on Earthd. Springs do not work on Marse. We cannot answer this question because we cannot get a spring to Mars

A cart is sliding along a frictionless track. It is moving with a speed of 10 m/s at position A on the track shown in the figure. What is the speed of the bead at point C?