Abington Heights High School
Physics L-2
Chapter 5 - Practice Quiz 3
Select the answer that best completes the question.
1. A car enters a horizontal, curved roadbed of radius 50 m. The coefficient of static friction between the tires and the roadbed is 0.20. What is the maximum speed with which the car can safely negotiate the unbanked curve?
A.5 m/s
B.10 m/s
C.20 m/s
D.40 m/s
E.100 m/s


2. An indoor track is to be designed such that each end is a banked semi-circle with a radius of 24 m. What should the banking angle be for a person running at speed v = 6.0 m/s?
A.8.7°
B.11°
C.14°
D.22°
E.45°


3.
A 1000-kg car travels along a straight 500-m portion of highway (from A to B) at a constant speed of 10 m/s. At B, the car encounters an unbanked curve of radius 50 m. The car follows the road from B to C traveling at a constant speed of 10 m/s while the direction of the car changes from east to south.
R-1 Ref 5-2

What is the magnitude of the acceleration of the car as it travels from A to B?
A.2 m/s2
B.5 m/s2
C.10 m/s2
D.20 m/s2
E.zero m/s2



4.
A 1000-kg car travels along a straight 500-m portion of highway (from A to B) at a constant speed of 10 m/s. At B, the car encounters an unbanked curve of radius 50 m. The car follows the road from B to C traveling at a constant speed of 10 m/s while the direction of the car changes from east to south.
R-1 Ref 5-2

What is the magnitude of the acceleration of the car as it travels from B to C?
A.2 m/s2
B.5 m/s2
C.10 m/s2
D.20 m/s2
E.zero m/s2



5.
A 1000-kg car travels along a straight 500-m portion of highway (from A to B) at a constant speed of 10 m/s. At B, the car encounters an unbanked curve of radius 50 m. The car follows the road from B to C traveling at a constant speed of 10 m/s while the direction of the car changes from east to south.
R-1 Ref 5-2

What is the magnitude of the frictional force between the tires and the road as the car negotiates the curve from B to C?
A.20 000 N
B.10 000 N
C.5000 N
D.2000 N
E.1000 N



6. The earth exerts the necessary centripetal force on an orbiting satellite to keep it moving in a circle at constant speed. Which statement best explains why the speed of the satellite does not change even though there is a net force exerted on it?
A.The satellite is in equilibrium.
B.The acceleration of the satellite is 0 m/s2.
C.The centripetal force has magnitude mv2/r.
D.The centripetal force is canceled by the reaction force.
E.The centripetal force is always perpendicular to the velocity.


7. Callisto and Io are two of Jupiter's moons. The distance from Callisto to the center of Jupiter is approximately 4.5 times as far as that of Io. How does Callisto's orbital period, TC, compare to that of Io, TI?
A.TC = 4.5TI
B.TC = 21TI
C.TC = 9.5TI
D.TC = 0.2TI
E.TC = 2.7TI


8. Consider a hypothetical planet in our solar system whose average distance from the Sun is about four times that of Earth. Determine the orbital period for this hypothetical planet.
A.0.25 year
B.2.5 years
C.4 years
D.8 years
E.16 years


9. Consider a satellite in a circular orbit around the Earth. If it were at an altitude equal to twice the radius of the Earth, 2RE, how would its speed v be related to the Earth's radius RE, and the magnitude g of the acceleration due to gravity on the Earth's surface?
A.

B.

C.

D.

E.



10. A satellite is placed in equatorial orbit above Mars, which has a radius of 3397 km and a mass MM = 6.40 ´ 1023 kg. The mission of the satellite is to observe the Martian climate from an altitude of 488 km. What is the orbital period of the satellite?
A.9.18 ´ 102 s
B.3.62 ´ 103 s
C.7.36 ´ 103 s
D.1.08 ´ 105 s
E.7.27 ´ 1012 s



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