The centripetal force on a car rounding a curve on a level road is provided by a) gravity b)...
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![Page 1: The centripetal force on a car rounding a curve on a level road is provided by a) gravity b) friction c) the engine d) the cars brakes e) normal force.](https://reader033.fdocuments.us/reader033/viewer/2022061617/5514f60c550346b0338b61a7/html5/thumbnails/1.jpg)
The centripetal force on a car rounding a curve on a level road is
provided by
a) gravityb) friction
c) the engined) the car’s brakes
e) normal force
![Page 2: The centripetal force on a car rounding a curve on a level road is provided by a) gravity b) friction c) the engine d) the cars brakes e) normal force.](https://reader033.fdocuments.us/reader033/viewer/2022061617/5514f60c550346b0338b61a7/html5/thumbnails/2.jpg)
On a “banked” turn, what is providing the centripetal force
on a car?
a) friction and tension
b) friction and gravity
c) friction and normal force
d) friction only
![Page 3: The centripetal force on a car rounding a curve on a level road is provided by a) gravity b) friction c) the engine d) the cars brakes e) normal force.](https://reader033.fdocuments.us/reader033/viewer/2022061617/5514f60c550346b0338b61a7/html5/thumbnails/3.jpg)
The moon’s mass is only 1.2% of the earth’s mass. Relative to the
gravitational force the earth exerts on the moon, the gravitational force
the moon exerts on the earth is
a) smallerb) the samec) greater
d) depends on whether the moon is made of cheese or not
![Page 4: The centripetal force on a car rounding a curve on a level road is provided by a) gravity b) friction c) the engine d) the cars brakes e) normal force.](https://reader033.fdocuments.us/reader033/viewer/2022061617/5514f60c550346b0338b61a7/html5/thumbnails/4.jpg)
The moon’s mass is only 1.2% of the earth’s mass. The gravitational acceleration the earth experiences
compared to the gravitational acceleration the moon experiences
isa) smaller
b) the same
c) greater
![Page 5: The centripetal force on a car rounding a curve on a level road is provided by a) gravity b) friction c) the engine d) the cars brakes e) normal force.](https://reader033.fdocuments.us/reader033/viewer/2022061617/5514f60c550346b0338b61a7/html5/thumbnails/5.jpg)
A bucket on a water wheel with a radius of 2.5 m makes one
complete revolution in 4.2 seconds. How fast is the bucket moving?
a)7.48 m/s
b)3.7 m/s
c)2.6 m/s
d)1.87 m/s
v = d/t
d = Circumference = 2πr
v = 2π(2.5)/4.2
v = 3.7 m/s
![Page 6: The centripetal force on a car rounding a curve on a level road is provided by a) gravity b) friction c) the engine d) the cars brakes e) normal force.](https://reader033.fdocuments.us/reader033/viewer/2022061617/5514f60c550346b0338b61a7/html5/thumbnails/6.jpg)
A 0.5 kg ball moves in a circle 40 cm in radius at a speed of 4.0 m/s. Its centripetal acceleration
isa) 10 m/s2
b) 20 m/s2
c) 30 m/s2
d) 40 m/s2
F = mv2/r
ma = mv2/r
a = v2/r
a = 42/.4
a = 40 m/s2
![Page 7: The centripetal force on a car rounding a curve on a level road is provided by a) gravity b) friction c) the engine d) the cars brakes e) normal force.](https://reader033.fdocuments.us/reader033/viewer/2022061617/5514f60c550346b0338b61a7/html5/thumbnails/7.jpg)
If the mass of Sputnik was doubled, by what factor would the force
change if it was to remain in the same circular orbit?
a) two times greater
b) four times greater
c) half as much
d) one-fourth as much
e) no change
![Page 8: The centripetal force on a car rounding a curve on a level road is provided by a) gravity b) friction c) the engine d) the cars brakes e) normal force.](https://reader033.fdocuments.us/reader033/viewer/2022061617/5514f60c550346b0338b61a7/html5/thumbnails/8.jpg)
Two small masses that are 10 cm apart attract each other with a force of 10 N. When they are 5 cm apart,
with what force will they attract each other? (G = 6.67 10-11 Nm2/kg2)
a) 5 N
b) 2.5 N
c) 20 N
d) 40 N
1 22g
GmmF
r
![Page 9: The centripetal force on a car rounding a curve on a level road is provided by a) gravity b) friction c) the engine d) the cars brakes e) normal force.](https://reader033.fdocuments.us/reader033/viewer/2022061617/5514f60c550346b0338b61a7/html5/thumbnails/9.jpg)
An object moves in a circular path. If the radius is doubled while
keeping the speed the same, then the centripetal force must be:
a) two times moreb) half as much
c) four times mored) one-fourth as much
e) the same
2
2
4c
m rF
T
2
c
mvF
r
![Page 10: The centripetal force on a car rounding a curve on a level road is provided by a) gravity b) friction c) the engine d) the cars brakes e) normal force.](https://reader033.fdocuments.us/reader033/viewer/2022061617/5514f60c550346b0338b61a7/html5/thumbnails/10.jpg)
A planet of mass 3 1028 kg is in orbit around a star with mass 3 1030kg. The radius of the
orbit is 1.5 1010m. The speed of the planet in orbit is
a) 6.03 1048 m/sb) 1.15 1012 m/sc) 1.15 104 m/sd) 1.16 105 m/s
![Page 11: The centripetal force on a car rounding a curve on a level road is provided by a) gravity b) friction c) the engine d) the cars brakes e) normal force.](https://reader033.fdocuments.us/reader033/viewer/2022061617/5514f60c550346b0338b61a7/html5/thumbnails/11.jpg)
The speed of the planet from the previous question is 1.16 105 m/s. What is the period of
the planet’s orbit?
a)8.12 105 sb)4.21 106 sc)3.23 103 sd)2.74 103 s
![Page 12: The centripetal force on a car rounding a curve on a level road is provided by a) gravity b) friction c) the engine d) the cars brakes e) normal force.](https://reader033.fdocuments.us/reader033/viewer/2022061617/5514f60c550346b0338b61a7/html5/thumbnails/12.jpg)
The radius of the path of an object in constant circular motion is doubled. The
centripetal force needed if its speed remains the same is
a) half as great as it was beforeb) the same as before
c) twice as great as befored) four times as great as before
![Page 13: The centripetal force on a car rounding a curve on a level road is provided by a) gravity b) friction c) the engine d) the cars brakes e) normal force.](https://reader033.fdocuments.us/reader033/viewer/2022061617/5514f60c550346b0338b61a7/html5/thumbnails/13.jpg)
Consider a roller coaster doing a loop. What provides the centripetal
force?
a) Friction
b) Normal force
c) Tension
d) Gravity
![Page 14: The centripetal force on a car rounding a curve on a level road is provided by a) gravity b) friction c) the engine d) the cars brakes e) normal force.](https://reader033.fdocuments.us/reader033/viewer/2022061617/5514f60c550346b0338b61a7/html5/thumbnails/14.jpg)
Consider a roller coaster at the top of a loop. What provides the
centripetal force?
a) Friction and Gravity
b) Normal force and Friction
c) Tension and Normal Force
d) Gravity and Normal Force
e) Centripetal Force and Gravity