zephyr0001
New member
heya, here are 5 of a series of 30 multiple choice questions that I need some help on. Thanks a lot!
1. When several objects with different masses are droppped by an astronaut on the (airless) Moon, the resultunt motions:
A. Depend on densities of the objects, the one with the highest density falling fastest
B. Depend on densities of the objects, the one with the lowest density falling fastest
C. Depend on the masses of the objects, the least massive falling fastest
D. Depend on the masses of the objects, the most massive falling fastest
E. Are independent of the masses of the objects
2. An astronaut orbiting the Earth in the Space Shuttle feels weightless because:
A. At the location of the shuttle, the Earth's gravitational force is repulsive.
B. Her mass is zero in space; however, weight requires mass.
C. Two forces are acting on her in opposite directions, so they cancel and produce the same effect as if no force at all were acting.
D. No forces are acting on her.
E.Only one force - gravity - acts on her, but gravity also accelerates the shuttle so that the shuttle does not push up on her to create the feeling of weight within it.
3. Which of the following pairs of forces is an example of an action-reaction pair by Newton's third law?
A. For a tugboat pulling a barge, the force of the water on the barge and the force of the barge on the tugboat
B. For a dog pulling on its leash, the force of the dog on the leash and the force of the leash on the dog
C. For the solar system, the force of the Sun on Earth and the force of the Sun on Mars
D. For a student sitting on a chair, the weight of the student and the "normal" force that the chair exerts on the student
E. For a baseball player sliding into first base, the force of the baseball player on his shoes and the friction force of the ground on his shoes
4. Suppose we are having an exceptionally strong tide (a Spring Tide) right now. Approximately how long do we have to wait until we experience an exceptionally weak tide (Neap Tide)?
A. Two weeks
B. One year
C. One month
D. One week
E. Six hours
6. Which of the following five objects or persons is not accelerating?
A. A bicyclist gradually slowing down on a straight road while coasting toward a stop sign
B. An olympic swimmer exerting considerable force to maintain a constant speed in a straight line through the water
C. A motorcyclist traveling around a circular racetrack at a constant speed
D. An apple falling to the ground from an apple tree
E. Earth in its motion around the Sun
1. When several objects with different masses are droppped by an astronaut on the (airless) Moon, the resultunt motions:
A. Depend on densities of the objects, the one with the highest density falling fastest
B. Depend on densities of the objects, the one with the lowest density falling fastest
C. Depend on the masses of the objects, the least massive falling fastest
D. Depend on the masses of the objects, the most massive falling fastest
E. Are independent of the masses of the objects
2. An astronaut orbiting the Earth in the Space Shuttle feels weightless because:
A. At the location of the shuttle, the Earth's gravitational force is repulsive.
B. Her mass is zero in space; however, weight requires mass.
C. Two forces are acting on her in opposite directions, so they cancel and produce the same effect as if no force at all were acting.
D. No forces are acting on her.
E.Only one force - gravity - acts on her, but gravity also accelerates the shuttle so that the shuttle does not push up on her to create the feeling of weight within it.
3. Which of the following pairs of forces is an example of an action-reaction pair by Newton's third law?
A. For a tugboat pulling a barge, the force of the water on the barge and the force of the barge on the tugboat
B. For a dog pulling on its leash, the force of the dog on the leash and the force of the leash on the dog
C. For the solar system, the force of the Sun on Earth and the force of the Sun on Mars
D. For a student sitting on a chair, the weight of the student and the "normal" force that the chair exerts on the student
E. For a baseball player sliding into first base, the force of the baseball player on his shoes and the friction force of the ground on his shoes
4. Suppose we are having an exceptionally strong tide (a Spring Tide) right now. Approximately how long do we have to wait until we experience an exceptionally weak tide (Neap Tide)?
A. Two weeks
B. One year
C. One month
D. One week
E. Six hours
6. Which of the following five objects or persons is not accelerating?
A. A bicyclist gradually slowing down on a straight road while coasting toward a stop sign
B. An olympic swimmer exerting considerable force to maintain a constant speed in a straight line through the water
C. A motorcyclist traveling around a circular racetrack at a constant speed
D. An apple falling to the ground from an apple tree
E. Earth in its motion around the Sun