3. A roller coaster sits at the top of a hill and is preparing to enter...
I need help with problem 39 parts b,c,d Unit 7. Work and Energy In Class Packet Name: 36. A 2.45 kg rock is dropped from the top of a 15.5 m vertical cliff a. What is the potential energy of the rock relative to the base of the cliff before it is dropped? b. What is the kinetic energy of the rock just before it hits the ground below? c. What is the velocity of the rock at a point...
When a roller coaster went upside down at the top of a loop with a radius 8.0m, a speed of 11.2m/s was required to make the coaster feel safe. A. Assuming that air resistance and friction are negligible , what speed will the roller coaster have when it is right-side up at the bottom of the loop? B. The roller coaster begins its trip by being pulled up the lift hill by a chain lift and dropped after it reaches...
A 200-kg roller coaster reaches the top of the steepest hill with a speed of 6.20 km/h. It then descends the hill, which is at an angle of 20° and is 49.0 m long. What will its kinetic energy be when it reaches the bottom? Assume µk = 0.14.
A roller coaster reaches the top of the steepest hill with a speed of 6.1 km/h . It then descends the hill, which is at an average angle of 41 ∘ and is 37.5 m long. Part A What will its speed be when it reaches the bottom? Assume μk = 0.18.
A 200-kg roller coaster reaches the top of the steepest hill with a speed of 5.60 km/h. It then descends the hill, which is at an angle of 25° and is 58.0 m long. What will its kinetic energy be when it reaches the bottom? Assume µk = 0.10. A boy pulls a 20.0-kg box with a 130-N force at 33° above a horizontal surface. If the coefficient of kinetic friction between the box and the horizontal surface is 0.29...
Problem 1: Looping. The looping of a roller coaster has the radius R. The roller coaster starts at rest in height H over the deepest point of the looping (as shown in the figure). Neglect friction and consider the roller coaster as a mass point of mass m. Q.1) Express the total energy of the body. The reference point for the potential energy is at the center of the loop. Q.2) Find the speed of the body at the top...
A roller coaster begins at rest at the top of a 38 m hill. Find the velocity at a point 8 m above the bottom of the hill. Hint: PE at point 1 = (KE+PE) at point 2
1. A roller coaster has a 300 kg car. Assume the track is frictionless. a) The car starts at a speed 20 m/s on a horizontal track. It then goes through a circular loop. What is the speed of the car when it is at the top of the loop, h = 10 m above the horizontal track? b) What is the normal force applied from the track at the point? Does this force point upward or downward? Assume the...
PLEASE ANSWER CORRECTLY THE CORRECT ANSWER IS 46 A roller coaster cart starts at the top of a quarter circular hill (no friction) of some radius at a speed of 11.8 m/s. At the bottom of the hill it encounters a horizontal surface with friction and the coefficient of kinetic friction is 0.55. It travels over that horizontal surface for 8 meters and encounters a frictionless loop with a radius of 23 meters. If it is to just barely make...
diagram with dierent numbers) 30レ A roller coaster with people on board has a total mass of 4500 kg and starts at a height of 22.0 meters with a speed of 2.00 ms. 50.0 on on the way to the botiom of the ride. (See Figure 5-13) What is its iniial potenSal envergy. in whole number kilojoules? (Since the unit is given in the question, do not put it in the answer box.) Question 16:(1 point) kJ of A roller...