Physics Practice Questions Chapter 10

C

23) What prevents satellites such as a space shuttle from falling? A) gravity B) the absence of air drag C) Nothing; they're falling continuously all around the Earth.

A

28) An object is thrown vertically into the air. Because of air resistance, the time for its descent will be A) longer than the ascent time. B) shorter than the ascent time. C) equal to the ascent time. D) Not enough information given to say.

A

30) An airplane flies at 40 m/s at an altitude of 50 meters. The pilot drops a heavy package which falls to the ground. Where, approximately, does the package land relative to the plane's new position? A) beneath the plane B) 400 m behind the plane C) 500 m behind the plane D) more than 500 m behind the plane E) none of these

A

36) The tangential velocity of an Earth satellite is its velocity A) parallel to the surface of the Earth. B) perpendicular to the surface of the Earth. C) attributed to satellites moving in any direction.

circular

38) If a satellite's radial velocity is zero at all times, its orbit must be A) parabolic. B) elliptical. C) circular. D) geosynchronous.

E

40) What prevents satellites such as the space shuttle from falling? A) gravity B) centripetal force C) centrifugal force D) the absence of air drag E) Nothing; they are continually falling as they orbit the Earth.

D

41) The circular path of a satellite orbiting the Earth is characterized by a constant A) speed. B) acceleration. C) radial distance. D) all of these E) none of these

A

42) An Earth satellite is in an elliptical orbit. The satellite travels fastest when it is A) nearest the Earth. B) farthest from the Earth. C) It travels at constant speed everywhere in orbit.

C

43) The fastest moving planet in a solar system is A) the smallest planet. B) the most massive planet. C) the planet nearest the sun. D) the planet farthest from the sun. E) any planet, for they all move at the same speed.

B

57) Minimal orbit speed about the Earth is about 8 km/s. Minimal orbital speed about Jupiter would be A) less than 8 km/s. B) more than 8 km/s. C) about 8 km/s.

C

68) Angular momentum is conserved for a satellite in A) circular orbit. B) elliptical orbit. C) both of these D) neither of these