As a roller coaster (weight is w at rest) crosses the top of a 46-m-diamater loop-the-loop in a speed of 20 m/s. What is the apparent weight at the top of the loop. The answer is .77w I just don't know how

A roller coaster has a mass of 600 kg when loaded with passengers. Car approaches top end of curve radius 20 m. What is maximum velocity that the car can have without flying off track?

A ball with a mass of 1.50 kg rolls down a hemisphere from A to B. Se figure. At A, it has a centripetal acceleration with a magnitude of 1.80 m/s² and a speed of 1.20 m/s. At B, it has a centripetal acceleration with a magnitude of 5.50 m/s? and a normal force with a magnitude of 4.30 N. Find the magnitude of the normal force on the ball at A, and the angle 0. Ignore friction everywhere. VA = 1.20 m/s В VB = ? 0= ? R = ?

A car goes around a curve on a road that is banked at an angle of21.5°. Even though the road is slick, the car will stay on the roadwithout any friction between its tires and the road when its speedis 19.8 m>s. What is the radius of the curve?

A stuntman drives a car (without negative lift) over the top of a hill, the cross section of which can be approximated by a circle of radius R= 250 m. What is the greatest speed at which he can drive without the car leaving the road at the top of the hill in km/h? R Lütfen birini seçin: O A. 178 O B. 221 O C. 135 O D. 150 O E. 205

A 1500 kg car moving on a flat, horizontal road negotiates a curve. If the radius of the curve is 1600 m and coefficient of static friction between the tires and the road (µ,) is 0.1, what is the maximum speed (in m/s) the car can have and still make the turn successfully. (g=10 m/s³) O a. 20 O b. 30 Oc. 10 O d. 40

A ferris wheel has aradius of 12 m turns so that the riders experience a constant speed of 3.2 m/s. What is the centripetal force on a rider with a mass of 68 kg? Express your answer in N.

Pls help ASAP.

m R A racing greyhound can run around curves at high speed. Suppose the radius of a semicircular turn on a dogtrack is 21.6 m, and the speed of a greyhound is constant at 15.1 m/s; assume the dog's mass is 22.7 kg. What is the acceleration of the greyhound on the turn? (in m/s^2) OA: 4.487 OB: 5.070 OC: 5.729 OD: 6.474 OE: 7.316 OF: 8.267 OG: 9.342 OH: 10.556

Q4.