The hammer throw was one of the earliest Olympic events. In this event, a heavy ball attached to a chain is swung several times in a circular path until it is released. The winning athlete is the one who throws the ball the greatest distance. The last complete rotation of 2016 Olympic champion Anita Włodarczyk’s final turn took only 0.43 s. The radius of the ball’s path, including her extended arms, was 2.1 m.a. What was the frequency of this rotation?b. What was the speed of the ball?c. What was the ball’s acceleration, in units of g?

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

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A: Given:-     Radius R=2m     a→=20m/s2        θ=30°        at=tangetial acceleration…

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A: Given Data : The length of the blade is given as r = 30cm The angular speed of the blades is given…

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A: Given that an astronaut is being tested in a centrifuge. The centrifuge has a radius of 2 m and, in…

Q: A 5.4-m-diameter merry-go-round is initially turning with a 4.1 s period. It steadily slows down and…

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Q: A test car starts from rest on a horizontal circular track of 90-m radius and increases its speed at…

A: Given information: The radius of the circular track, r=90 m The rate of uniform velocity, v=85 km/h…

Q: Olympic ice skaters are able to spin at about 5 rev/s. (a) What is their angular velocity in radians…

A: A) The angular velocity is given by,

Q: 80 m 40 m A race track is constructed such that two arcs of radius 80 m at A and 40 m at 8 are…

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Q: A 50 Gram sample of Uranium ore is put into a centrifuge that runs at 30,000 rpm. If the radius of…

A: We know that v = rw Centripetal acceleration= v2 /r = rw2

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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.

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

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Q: Consider a bike gear such as the two shown. Let's consider a gear that has a radius of 15…

A: Given: The radius of the gear is 15 cm. The speed of the gear is 4.9 m/s constant.

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

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Q: An electric fan has blades of length 30cm as measured form the axis of rotation. If the fan is…

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Q: A disk of radius 2.25 m rotates about its axis. Points on the rim of the disk undergo tangential…

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

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Q: A car at the Indianapolis 500 accelerates uniformly from the pit area, going from rest to a speed of…

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Q: An electric fan has blades of length 30cm as measured form the axis of rotation. If the fan is…

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Q: A fan blade, initially at rest, rotates with a constant acceleration of 0.025 rad/s4. What the time…

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

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Q: A particle moves in a circular path of radius R = 2 m. At some instant of time, its total…

A: This question is based on Circular Motion topic. We need to have knowledge of acceleration in…

Q: A centrifuge accelerates uniformly from rest to 13000 rpm in 180 s. A. Through how many…

A: The acceleration is uniform. So, we can calculate the average velocity as shown below.

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A: Given:-         Angular speed of the disc ω = 38 rpm…

Q: 15.0 m/s 4. The Figure represents the total acceleration of a particle moving clockwise ina circle…

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Q: A particle moves in a circular path of radius R = 2 m. At some instant of time, its total…

A: Given data:  Acceleration (a) = 20 m/s2 Angle with the radius (θ) = 30° Required: Tangential…

Q: A disk with a radius of 3,6 cm rotates around a fixed axis so that the dependence of the angle of…

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Q: An electric fan has blades of length 30cm as measured form the axis of rotation. If the fan is…

A: Given  length of the blades is 30 cm (r)The fan is rotating at  a speed of 1220 rpm (N)To convert…

Q: rotating disk is initially spinning at w = 6rev / s , slows down and stops in 19.7 . What is the…

A: Given values:- Initial angular velocity,(ω0)=6 rev/sec -----(1) Time of stop,(t)=19.7 sec ----(2)…

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

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Q: An electric fan revolving at 900 rpm slows down uniformly to 300 rpm while making 50 revolutions.…

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Q: A disk of radius 0.400 m rotates at a constant rate of 200 rev/min. (a) What is the speed (in m/s)…

A: Given data The radius of the disk is: r = 0.4 m The number of revolutions of the disk is N = 200…

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.