Physics 011

MC#5A

1.	A Cadillac with mass 3 mo and a Volkswagen with mass mo go around the same unbanked circular curve on the freeway. Bumper to bumper they go with the same speed vo. The centripetal acceleration of the VW is ao and the centripetal force acting on it is Fo. The centripetal acceleration of the Cadillac is ___ ao. The correct answer: equal to See Section 5-1
2.	A Cadillac with mass 3 mo and a Volkswagen with mass mo go around the same unbanked circular curve on the freeway. Bumper to bumper they go with the same speed vo. The centripetal acceleration of the VW is ao and the centripetal force acting on it is Fo. The centripetal force acting on the Cadillac is ___ Fo. The correct answer: more than
3.	A Cadillac with mass 3 mo and a Volkswagen with mass mo go around the same unbanked circular curve on the freeway. Bumper to bumper they go with the same speed vo. The centripetal acceleration of the VW is ao and the centripetal force acting on it is Fo. If its speed was increased to 3 vo, the centripetal acceleration of the VW would be ao x ___. The correct answer: 9 See Section 5-1
4.	A Cadillac with mass 3 mo and a Volkswagen with mass mo go around the same unbanked circular curve on the freeway. Bumper to bumper they go with the same speed vo. The centripetal acceleration of the VW is ao and the centripetal force acting on it is Fo. If the speed of the cars was 2 vo, the centripetal force acting on the VW would be Fo x ___. The correct answer: 4 See Section 5-2
5.	Two spherical planets with radii R1 = 2 Ro and R2 = Ro and masses m1 = 2 mo and m2 = mo respectively are in circular orbits of radii r1 = 2 ro and r2 = ro respectively about the same star which has mass Ms mo. Much of this is depicted in the following figure. The year for the first planet (the one with mass m1) is ___ the year for the second planet. The correct answer: more than See Section 5-9
6.	Two spherical planets with radii R1 = 2 Ro and R2 = Ro and masses m1 = 2 mo and m2 = mo respectively are in circular orbits of radii r1 = 2 ro and r2 = ro respectively about the same star which has mass Ms mo. Much of this is depicted in the following figure. The speed of the first planet in its orbit is ___ the speed of the second planet in its orbit. The correct answer: less than See Section 5-8
7.	Two spherical planets with radii R1 = 2 Ro and R2 = Ro and masses m1 = 2 mo and m2 = mo respectively are in circular orbits of radii r1 = 2 ro and r2 = ro respectively about the same star which has mass Ms mo. Much of this is depicted in the following figure. The magnitude of the gravitational force exerted by the star on the first planet is ___ the magnitude of the gravitational force exerted by the star on the second planet. The correct answer: less than See Section 5-6
8.	Two spherical planets with radii R1 = 2 Ro and R2 = Ro and masses m1 = 2 mo and m2 = mo respectively are in circular orbits of radii r1 = 2 ro and r2 = ro respectively about the same star which has mass Ms mo. Much of this is depicted in the following figure. The acceleration of gravity on the surface of the second planet is ___ the acceleration of gravity on the surface of the first planet. The correct answer: more than See Section 5-7
9.	Two spherical planets with radii R1 = 2 Ro and R2 = Ro and masses m1 = 2 mo and m2 = mo respectively are in circular orbits of radii r1 = 2 ro and r2 = ro respectively about the same star which has mass Msmo. Much of this is depicted in the following figure. The magnitude of the gravitational force exerted on the first planet by the second planet is ___ the magnitude of the gravitational force exerted on the second planet by the first planet. The correct answer: equal to See Section 4-5
10.	The force of gravity between two bodies is: The correct answer: inversely proportional to the square of the distance between them. See Section 5-6
11.	Two bodies of equal mass are separated by a distance of 2 meters. If the mass of one body is doubled, the force of gravity between the two bodies will The correct answer: be twice as great. See Section 5-6
12.	The distance between a spaceship and the center of the Earth increases from one Earth radius to three Earth radii. What happens to the force of gravity acting on the spaceship? The correct answer: It becomes 1/9 as great. See Section 5-6
13.	A 100 kg astronaut lands on a planet with a radius three times that of Earth and a mass nine times that of Earth. The acceleration due to gravity, g, experienced by the astronaut will be The correct answer: the same value as g on earth. See Section 5-7
14.	For the system of a man in an elevator, his weight will appear to be greatest when The correct answer: the elevator is accelerated upward. See Section 5-8