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Friction and Vertical Circular Motion Problems

3)RSN4A rolle...

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3)RSN4A roller coaster is designed such that ridersexperience '"weightlessness" as they go round thetop of a hill whose radius of curvature is 20 m. Thespeed of the car at the top of the hill is between\lbrack AIPMT (Prelims)-2008\rbrack(1) 13 m/s and 14 m/s (2) 14 m/s and 15 m/s3) 15 m/s and 16 m/s (4) 16 m/s and 17 m/s

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Q. A roller coaster is designed such that riders experience "weightlessness" as they go round the top of a hill whose radius of curvature is

20 m

. The speed of the car at the top of the hill should be between

Q. The designer of a "roller coaster" wishes to experience weightlessness round the top of a hilltop of radius curvature

20 m

. The speed at the hilltop is

(g = 9.8 m / s^{2})

:

Q. A roller coaster of mass

2000 kg

v_{1} = 10 m/s

as it goes over the top of a

15 m

high hill. Then it goes over another hill of height

10 m

and at the crest of that hill, the roller coaster is moving with speed

v_{2} = 13 m/s

. How much is the work done by friction on the roller coaster during its movement between the hills ? Take

g = 10 {m/s}^{2}

.

Q. A roller coaster of mass

2000 kg

v_{1} = 10 m/s

as it goes over the top of a

15 m

high hill. Then it goes over another hill of height

10 m

and at the crest of that hill, the roller coaster is moving with speed

v_{2} = 13 m/s

. How much is the work done by friction on the roller coaster during its movement between the hills ? Take

g = 10 {m/s}^{2}

.

An object travels 16 m in 4 s and then another 16 m in 2 s. What is the average speed of the object?

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