Helicopter blades withstand tremendous stresses. In addition to supporting the weight of a helicopter, they are spun at rapid rates and experience large centripetal accelerations, especially at the tip. (For each answer, enter a number.) a) Calculate the magnitude (in m/s2) of the centripetal acceleration at the tip of a 3.90 m long helicopter blade that rotates at 345 rev/min. b) Compare the linear speed of the tip with the speed of sound (taken to be 340 m/s). v tip / v sound = ?

Q: A 50.0-kg child stands at the rim of a merry-go-round of radius 2.95 m, rotating with an angular…

A: a) The expression for find centripetal acceleration is ac=v2r=ωr2r=ω2r Insert values in the above…

Q: A 1.25 g pepperoni rests at a distance of 7.5 cm from the centre of a pizza being spun by the pizza…

A: mass (m) = 1.25 g = 0.00125 kg distance from center (r) = 7.5 cm = 0.075 m Angular speed (ω) = 68…

Q: Tangential speed is measured in units of ? choose all that apply.   A. mph   B. Rotation per…

A:

Q: The earth has a radius of 6380 km and turns around once on its axis in 24 h. (a) What is the radial…

A: Given: Radius of earth, R=6380 km=6380×103 m Time, T=24 hours=24 h×3600 s1 h=86400 s a) Radial…

Q: A point on a rotating turntable 17.5 cm from the center accelerates from rest to a final speed of…

A: The tangential acceleration is given by,

Q: Given that g = 9.81 m/s², and the "ground" in this spacecraft is the outer diameter (outer hull)…

A: Recall Radial acceleration=v2/R=ω2R

Q: A wind turbine is rotating counterclockwise at 0.78 rev/s and slows to a stop in 17 s. Its blades…

A: As per our guidelines, we are supposed to answer only first three subparts in case of multiple…

Q: A car is rounding a flat, unbanked curve with radius R = 200m, a.) If the coefficient of static…

A: (a) The frictional force is balanced by the centripetal force. f=FcμsN=mv2Rμsmg=mv2Rv=μsgR…

Q: A point moves on a path of 3m in diameter so that the distance traversed is s= 3t^2. What is the…

A:

Q: A 50.0-kg child stands at the rim of a merry-go-round of radius 2.00 m, rotating with an angular…

A: Given:  mass,m = 50 kg  radius, r =  2 m  angular speed, w = 3 rad/s

Q: A planet orbits a star, in a year of length 3.48 x 107 s, in a nearly circular orbit of radius 1.51…

A:

Q: For the particle below, find it's (a) radial acceleration (b) tangential acceleration. (C) If it is…

A:

Q: This figure (|a| = 18.0 m/s) represents the total acceleration of a particle moving clockwise in a…

A:

Q: Olympic ice skaters are able to spin at about 2 rev/s. (a) What is their angular velocity in radians…

A: Given The number of revolution is N = 2 rev/s. The angular velocity is calculated as, ω=2πN…

Q: If the tangential acceleration is there (0) this is an indication that: Select one: O a. the…

A: If there is tangential acceleration, then the motion is not uniform circular motion.

Q: A shepherd's sling, an ancient weapon, twirls a stone in a vertical circle with a constant angular…

A: Since, angular speed is constant. It would be same in both cases.

Q: A 1,200-kg car, that is moving in a 40-m radius circle on level ground, has a tangential velocity…

A: Given Data:-                      Mass of the car m = 1,200 kg                      Radius of the…

Q: A rock is spun in a sling at a constant speed of 56.0 m/s. What rate of rotation, in rev/s, is…

A:

Q: The car A has a forward speed of 17 km/h and is accelerating at 3.5 m/s?. Determine the velocity and…

A:

Q: A bug is sitting on the rim of a garden hose reel at radius 0.33 m from the axis of rotation. A…

A:

Q: A 50.0-kg child stands at the rim of a merry-go-round of radius 2.85 m, rotating with an angular…

A: mass of child = 50 kg Radius = 2.85 m w ( angular speed) = 3.9 rad/sec

Q: The world's tallest Ferris wheel is the High Roller in Las Vegas, NV. It has a radius of about 79…

A: The given radius of the Ferris wheel is R = 79 m and the time of ride is given as t = 8 minute = 480…

Q: How many revolutions per minute would a 30 m -diameter Ferris wheel need to make for the passengers…

A: The centripetal force has to be in a way that balances the weight of the passenger.

Q: A maintenance man is twirling a set of keys on the end of a lanyard. If the keys have a centripetal…

A: Centripetal acceleration is given by ACP =V2/R Here, ACP = centripetal acceleration = 145 m/s2. V =…

Q: A 50.0-kg child stands at the rim of a merry-go-round of radius 2.95 m, rotating with an angular…

A:

Q: Olympic ice skaters are able to spin at about 5.0 rev/s. a. What is their angular velocity in…

A:

Q: 1. A wind turbine is rotating at 31 rev/min. How fast (in m/s) is a point on the blade is moving…

A:

Q: What is the tangential velocity

A:

Q: A 50.0-kg child stands at the rim of a merry-go-round of radius 2.00 m, rotating with an angular…

A: Given: The mass of the child is m=50 kg. The radius of merry-go round is r=2 m. The angular speed…

Q: You are at a playground with a merry-go-round, which is initially sitting still.  You push on it,…

A:

Q: An ordinary workshop grindstone has a radius of 9.50 cm and rotates at 7000 rev/min.   (a) Calculate…

A: Given information: Here, r is the grindstone radius, and ω is the grindstone angular speed.

Q: A 50.0kg child stands at the rim of a merry-go-round of radius 2.20m, rotating with an angular speed…

A: Given Data: The mass of a child is, m=50.0 kg The radius of a wheel is, r=2.20 m The angular speed…

Q: The cutting cord on a gas-powered weed cutter is 0.16 m in length. If the motor rotates at the rate…

A:

Q: An astronaut is being tested in a centrifuge. The centrifuge has a radius of 12.0 m and, in…

A: (a). Angular velocity of astronaut is

Q: What is is the tangential velocity of a train moving in a circular track with radius of 9.72m if its…

A: Given: the radius of circular track, R = 9.72 m  centripetal acceleration, a = 37 m/s2

Q: At takeoff, a commercial jet has a 45.00 m/s speed. Its tires have a diameter of 0.400 m. (a) At how…

A:

Q: A 50.0-kg child stands at the rim of a merry-go-round of radius 3.00 m, rotating with an angular…

A:

Q: A 50.0-kg child stands at the rim of a merry-go-round of radius 2.85 m, rotating with an angular…

A: Given:Mass,m=50 kgRadius,r=2.85 mAngular Speed,ω=3.25 rad/s Now,(a) What is the child's centripetal…

Q: How fast (in rpm) must a centrifuge rotate if a particle 9.50 cm from the axis of rotation is to…

A:

Centripetal Force

A particle, body, object or certain mass while travelling in a rotational path or semicircular path, experiences an inertia force. If that inertia force pulls the towards the inward of the imaginary circle in the rotation, it is termed as centripetal force.