Circular Motion

Presentation

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Physics

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12th Grade

•

Practice Problem

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Hard

•

NGSS

HS-PS2-1, HS-PS2-4

Standards-aligned

Daniel Simunic

Used 12+ times

FREE Resource

3 Slides • 11 Questions

Circular Motion

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Multiple Select

The equations that relate centripetal force and acceleration to velocity:

$F_c=\frac{mv^2}{r}$

$a_c=\frac{v^2}{r}$

$a_c=\frac{mv^2}{r}$

$F_c=\frac{v^2}{r}$

Multiple Choice

A 0.50 g ant is clinging precariously to a spinning turntable. The turntable’s radius is 20cm and it is spinning at 40 rpm.

a) Calculate the period of the turntable.

b) Calculate the ant’s velocity.

c) Calculate the centripetal force on the ant.

a) T = 1.5s b) 0.84 ms^-1 c) F_c = 1.8 x 10^-3 N

a) T = 0.67s b) 1.9 ms^-1 c) F_c = 2.1 x 10^-4 N

a) T = 1.5s b) 1.2 ms^-1 c) F_c = 2.1 x 10^-3 N

Explain why the water doesn’t come out of the bucket as it swings in a vertical circle.

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Banked curves on roads are designed to aid cornering by provideing an extra force component to accerlerate the car towards the centre of the turn...

Multiple Choice

A 2500kg bus is turning a corner at 150ms^-1 and is banked at an angle of 10⁰. a) Calculate the size of the centripetal force.

b) Calculate the radius of the turn.

a) F_c= 800 N b) r = 3 000 m

a) F_c= 4400 N b) r = 13 000 m

a) F_c= 40 N b) r = 1000 m

Multiple Choice

What is the force that causes centripetal acceleration when a car goes around a curve on a flat road?

Friction

Gravity

Normal

Tension

Multiple Choice

When a ball attached to string is swung in a vertical circle

the tension is always equal to the centripetal force

the tension is greatest at the top

the tension is greatest at the bottom

the tension is greatest halfway up

Multiple Choice

The maximum speed with which a car can take a circular turn of radius R is v. The maximum speed with which the same car, under the same conditions, can take a circular turn of radius 2R is

v√2

2v√2

Multiple Choice

A popular daredevil trick is to complete a vertical loop on a motorcycle. This trick is dangerous, however, because if the motorcycle does not travel with enough speed, the rider falls off the track before reaching the top of the loop. What is the minimum speed necessary for a rider to successfully go around a vertical loop of 10 meters?

5.5 ms^-1

9.9 ms^-1

4.4 ms^-1

8.8 ms^-1

Circular Motion

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