B C A 2. A circus performer drives a motorcycle with constant speed v around the inside of a vertical hoop of radius r. The combined mass of the rider and the motorcycle is m. (a) What is the centripetal acceleration of the motorcycle at each of the three points A, B, C? (b) What is the normal force exerted on the motorcycle by the track at each of the three points A, B, C?
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- it takes a 600kg racing car 10 secs to travel at a uniform speed around a circular track with a radius of 50m. What average force must the car's tires exert against the track tp maintain this circular motion? What is the acceleration of the car?A race car rounds a curve at 60 m/s. The radius of the curve is 400 m, and the cars mass is 600kg. a) what is the cars (centripetal) acceleration? What is it in g's? b) what is the centripetal force acting on the car?A roller-coaster track is set with hills and valleys as shown in the figure. A roller-coaster car crests hill "A" at 5 m/s. What force will provide the centripetal force needed for the car to stay on this circular path? 200 OA Weight OB Tension OC. Normal force Op Friction C 160 m
- A 2.0kg ball swings in a vertical circle on the end of an 80cm long string. The tension in the string is 20N when its angle from the highest point on the circle, 0, is 30deg. a) What is the ball's speed when 0-30deg? b) What are the magnitude and direction of the ball's acceleration when 0=30deg?B3A 25kg child sitting 1.3m from the center of a merry go round moves with a speed of 1.2m/s. Calculate (a) the centripetal acceleration of the child and (B) the net horizontal force exerted on the child. A. I got 1.10m/s2 B. I got 27.5N
- Mary and her younger brother Alex decide to ride the 17 ft diameter carousel at the State Fair. Mary sits on one of the horses in the outer section at a distance of 7 feet from the center. Alex decides to play it safe and chooses to sit in the inner section at a distance of 6 feet from the center. What is Mary's centripetal acceleration ay compared to that of Alex's centripetal acceleration a,? Give your answer as a multiple of aA. aA3. A 900 kg car drives overa brige in the shape of acircular arc with radius40 m. The car moveswith a constant speed valong the circular bridge. a. In the middle of the bridge, what is the direction of the car’s acceleration? Explain. b. The normal force is the apparent weight of the car, that is, it’s what a scale would readif placed between the car and the road. What is the speed v required for the apparentweight of the car to be half of its actual weight?spin Out is a carnival ride consisting of a large open cylinder. Riders stand inside with their backs against the cylinder wall. a) What is the centripetal force acting on you in the ride if the radius of the cylinder is 3.5 m, your mass is 50 kg, and your are traveling at 5 m/s? b) What force keeps you from sliding downward and how does that force relate to the above spinning speed?
- A car rounds a 75 m radius curve at a constant speed of 18 m/s. A ball is suspended by a string from the ceiling the car and moves with the car. The angle between the string and the vertical is: Select one: O a. 0° O b. 90° Oc. 1.4° O d. cannot be found without knowing the mass of the ball Ое. 24°The passengers in a roller coaster feel 42 % heavier than their true weight as the car goes through a loop with a 30 m radius of curvature. What is the car's speed at the bottom of the loop? Use g = 10 N/kg. Hint: How heavy some one feels is another name for normal force. The problem therefore tells you the normal force. If you know weight and normal force, you can determine centripetal acceleration. You can substitute a value for mass if you wish.Hi please help with the following: A 3.0 kg rocket propelled toy car has a speed of 6.0 m/s as it rides inverted at the top of a vertical circular track of radius 1.5m. What is the force in Newton's exerted by the track on the car?