8. Centripetal Forces & Gravitation

Uniform Circular Motion

8. Centripetal Forces & Gravitation

# Uniform Circular Motion - Video Tutorials & Practice Problems

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concept

## Intro to Circular Motion

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2

Problem

ProblemA ball travels on a frictionless circular track at 3m/s. The ball cannot have an acceleration greater than 1.5m/s^{2} or it will go off the track. What is the smallest radius the circular track can have so that the ball stays on the track?

A

R = 3 m

B

R = 12 m

C

R = 2 m

D

R = 6m

3

example

## Circular Orbit of the Moon

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PRACTICE PROBLEMS AND ACTIVITIES (30)

- At its Ames Research Center, NASA uses its large '20-G' centrifuge to test the effects of very large accelerat...
- At its Ames Research Center, NASA uses its large '20-G' centrifuge to test the effects of very large accelerat...
- A model of a helicopter rotor has four blades, each 3.40 m long from the central shaft to the blade tip. The m...
- A model of a helicopter rotor has four blades, each 3.40 m long from the central shaft to the blade tip. The m...
- The earth has a radius of 6380 km and turns around once on its axis in 24 h. (b) If arad at the equator is gre...
- The earth has a radius of 6380 km and turns around once on its axis in 24 h. (a) What is the radial accelerati...
- Communications satellites are placed in a circular orbit where they stay directly over a fixed point on the eq...
- The radius of the earth's very nearly circular orbit around the sun is 1.5 x 10^11m. Find the magnitude of the...
- The radius of the earth's very nearly circular orbit around the sun is 1.5 x 10^11m. Find the magnitude of the...
- As the earth rotates, what is the speed of (a) a physics student in Miami, Florida, at latitude 26 degrees
- The earth's radius is about 4000 miles. Kampala, the capital of Uganda, and Singapore are both nearly on the e...
- Peregrine falcons are known for their maneuvering ability. In a tight circular turn, a falcon can attain a cen...
- (I) A jet plane traveling 1890 km/h (525 m/s) pulls out of a dive by moving in an arc of radius 4.80 km. What ...
- (II) A bug walks outward from the center of a turntable that is rotating at 65 rpm. If the coefficient of stat...
- (II) A coin is placed 10.5 cm from the axis of a rotating turntable of variable speed. When the speed of the t...
- A 200 g block on a 50-cm-long string swings in a circle on a horizontal, frictionless table at 75 rpm. (a) Wha...
- FIGURE P8.54 shows two small 1.0 kg masses connected by massless but rigid 1.0-m-long rods. What is the tensio...
- Suppose the moon were held in its orbit not by gravity but by a massless cable attached to the center of the e...
- A 200 g block on a 50-cm-long string swings in a circle on a horizontal, frictionless table at 75 rpm. (b) Wha...
- (III) The position of a particle moving in the xy plane is given by r→ = (2.0m) cos [(3.0 rad/s)t ] i hut +(2....
- (III) The position of a particle moving in the xy plane is given by r→ = (2.0m) cos [(3.0 rad/s)t ] i hut +(2....
- (II) How many revolutions per minute would a 22-m-diameter Ferris wheel need to make for the passengers to fee...
- (II) While fishing, you get bored and start to swing a sinker weight around in a circle below you on a 0.45-m ...
- (II) Tarzan plans to cross a gorge by swinging in an arc from a hanging vine (Fig. 5–50). If his arms are capa...
- A small bead of mass m is constrained to slide without friction inside a circular vertical hoop of radius r wh...
- A train traveling at a constant speed rounds a curve of radius 215 m. A lamp suspended from the ceiling swings...
- A small bead of mass m is constrained to slide without friction inside a circular vertical hoop of radius r wh...
- A small bead of mass m is constrained to slide without friction inside a circular vertical hoop of radius r wh...
- In a “Rotor-ride” at a carnival, people rotate in a vertical cylindrically walled “room.” See Fig. 5–52. If th...
- A flat puck (mass M) is revolved in a circle on a frictionless air hockey table top, and is held in this orbit...