September 18th, 2014 | Chapter 1-10 | Happy Belated Birthday ~*
Terms : Hide Images
| 1665952337 | Something may turn out to be right or wrong. If it is valid, there must be a test for proving it wrong. This some thing is a... | hypothesis | 0 | |
| 1665952338 | A theory is a synthesis of a large body of well tested knowledge in... | science | 1 | |
| 1665952339 | A man weighing 1000N stands at rest on two bathroom scales with his weight distributed evenly on both scales. The reading on each scale says... | 500N | 2 | |
| 1665952340 | If no external forcers are acting on a moving object, it will continue moving at a ... | constant velocity | 3 | |
| 1665952341 | A ball is thrown upwards and returns to the same position. Compared with its original speed after release, its speed when it returns is about... | the same | 4 | |
| 1665952342 | Without friction, a large block of ice and a small block start sliding down an incline together, the heavier block will get to the bottom... | at the same time as the lighter one | 5 | |
| 1665952343 | Ten seconds after starting from rest, a car is moving at 40 m/s. What is the car's acceleration? | 4.0 m/s^2 | 6 | |
| 1665952344 | A kilogram is a measure of an object's | mass | 7 | |
| 1665952345 | An object is propelled along a straight-line path in space by a force. If the mass of the object somehow becomes twice as much, its acceleration | halves | 8 | |
| 1665952346 | The weight of a 1-kg mass at the Earth's surface is about | 10N | 9 | |
| 1665952347 | While an object near the Earth's surface is in free fall, its velocity | increases | 10 | |
| 1665952348 | A ball is thrown upwards from the surface of the earth at the speed 10m/s. It returns to the same position. How long does it stay in the air (neglect the air resistance)? | 2 seconds | 11 | |
| 1665952349 | Whenever the net force on an object is zero, its acceleration is | zero | 12 | |
| 1665952350 | Two tennis balls fall through the air from a tall building. One of them is filled with lead pellets. In presence of air-resistance, the ball to reach the ground first is the ... | lead filled ball | 13 | |
| 1665952351 | Compared to a 1-kg block of solid iron, a 2-kg block of solid iron has twice as much | inertia, volume and mass | 14 | |
| 1665952352 | The two measurements necessary for calculating average speed are | distance and time | 15 | |
| 1665952353 | A player hits a ball with a bat. The action force is the impact of the bat against the ball. The reaction to this force is the | force that the ball exerts on the bat | 16 | |
| 1665952354 | A 5 kg ball has a acceleration of 2 m/s2. The the magnitude of the force responsible for producing this acceleration is | 10N | 17 | |
| 1665952355 | Which is the following is not a vector quantity? | Mass | 18 | |
| 1665952356 | A ball is thrown upwards and returns to the same position. Compared with its original speed after release, its speed when it returns is about | the same | 19 | |
| 1665952357 | A sheet of paper can be withdrawn from under a container of milk without toppling it if the paper is jerked quickly. This best demonstrates that the milk carton has | inertia | 20 | |
| 1665952358 | An object in mechanical equilibrium is an object | at rest, moving with constant velocity, and has no acceleration | 21 | |
| 1665952359 | The force of friction on a sliding object is 10 N. The applied force needed to maintain a constant velocity is | 10N | 22 | |
| 1665952360 | An object at rest near the surface of a distant planet starts to fall freely. If the acceleration due to gravity there is twice that of the Earth, its speed one second later would be | 20 m/s | 23 | |
| 1665952361 | If an object moves with constant acceleration, its velocity must | change by the same amount each second | 24 | |
| 1665952362 | In each second of fall, the distance a freely falling object will fall is | increasing | 25 | |
| 1665952363 | While a car travels around a circular track at a constant speed, its | acceleration, velocity, and inertia is NOT zero | 26 | |
| 1665952364 | Disregarding air resistance, objects fall with constant | acceleration | 27 | |
| 1665952365 | Your weight is the ... attraction force between you and the earth | gravitational | 28 | |
| 1665952366 | The Newton(N) is a unit of | force | 29 | |
| 1665952367 | If an object's mass is decreasing while a constant force is applied to the object, the acceleration | increases | 30 | |
| 1665952368 | A 10-N falling object encounters 4 N of air resistance. The net force on the object is | 6N | 31 | |
| 1665952369 | An apple at rest weighs 1 N. The net force on the apple when it is in free fall is | 1N | 32 | |
| 1665952370 | f a non-rotating object has no acceleration, then we can say for certain that it is | in mechanical equilibrium | 33 | |
| 1665952371 | If the mass of an object does not change, a constant net force on the object produces constant | velocity and acceleration | 34 | |
| 1665952372 | The mass of a pet turtle that weighs 10 N is | 1kg | 35 | |
| 1665952373 | An object following a straight-line path at constant speed has zero... | acceleration | 36 | |
| 1665952374 | A rock is thrown vertically into the air. At the very top of its trajectory the net force on it is | equal to its weight | 37 | |
| 1665952375 | If more horizontal force is applied to a sliding object than is needed to maintain a constant velocity | the object accelerates in the direction of the applied force | 38 | |
| 1665952376 | When a falling object has reached its terminal velocity, its acceleration is | zero | 39 | |
| 1665952377 | A skydiver jumps from a high-flying plane. As her velocity of fall increases, her acceleration | decreases | 40 | |
| 1665952378 | A heavy rock and a light rock of the same size are falling through the air from a tall building. The one that encounters the greatest air resistance is the | heavy rock | 41 | |
| 1665952379 | A player catches a ball. Consider the action force to be the impact of the ball against the player's glove. The reaction to this force is the | force the glove exerts on the ball | 42 | |
| 1665952380 | A person is attracted toward the center of Earth by a 500-N gravitational force. The Earth is attracted toward the person with a force of | 500N | 43 | |
| 1665952381 | A car traveling at 100 km/hr strikes an unfortunate bug and splatters it. The force of impact is | the same for both | 44 | |
| 1665952382 | It is correct to say that impulse is equal to the change in ... it produces | momentum | 45 | |
| 1665952383 | A freight train rolls along a track with considerable momentum. If it rolls at the same speed but has twice as much mass, its momentum is | doubled | 46 | |
| 1665952384 | Two objects have the same size and shape, but one is much heavier than the other. When they are dropped simultaneously from a tower, they reach the ground at the same time, but the heavier one has a greater | momentum | 47 | |
| 1665952385 | Compared to falling on a stone floor, a wine glass may not break when it falls on a carpeted floor because the stopping time is ... on the carpet | longer | 48 | |
| 1665952386 | A 4 kg ball has a momentum of 12 kg m/s. What is the ball's speed? | 3 m/s | 49 | |
| 1665952387 | A heavy truck and a small car rolling down a hill at the same speed are forced to stop in the same amount of time. Compared to the force that stops the car, the force needed to stop the truck is | greater | 50 | |
| 1665952388 | A 1-kg chunk of putty moving at 1 m/s collides with and sticks to a 5-kg bowling ball initially at rest. The bowling ball and putty then move with a momentum of | 1 m/s | 51 | |
| 1665952389 | Two billiard balls having the same mass and speed roll toward each other. What is their combined momentum after they meet? | 0 | 52 | |
| 1665952390 | If you push for a half hour or a whole hour against a stationary wall | no work on the wall is done in either case. | 53 | |
| 1665952391 | If an object is raised twice as high, its potential energy will be ... as much | twice | 54 | |
| 1665952392 | An object that has kinetic energy must be | moving | 55 | |
| 1665952393 | An object may have potential energy because of its | position | 56 | |
| 1665952394 | When an automobile is braked to a stop, its kinetic energy is transformed to | heat | 57 | |
| 1665952395 | A ball rolling down an incline has its maximum kinetic energy at the | bottom | 58 | |
| 1665952396 | A block of ice sliding down an incline has its maximum speed at the | bottom | 59 | |
| 1665952397 | What task requires the most work; lifting a 50-kg sack 2 meters or lifting a 25- kg sack 4 meters | both are equal work | 60 | |
| 1665952398 | A TV set is pushed a distance of 2 m with a force of 20 N. How much work is done on the set? | 40J | 61 | |
| 1665952399 | Which has greater kinetic energy, a car traveling at 30 km/hr or a car of half the mass traveling at 60 km/hr? | 60 km/hr car | 62 | |
| 1665952400 | A rock is thrown straight up from the surface of the Earth. Which one of the following statements describes the energy transformation of the rock as it rises? Neglect air resistance. | The kinetic energy decreases and the potential energy increases | 63 | |
| 1665952401 | A popular swinging-balls apparatus consists of an aligned row of identical elastic balls that are suspended by strings so they barely touch each other. When two balls are lifted from one end and released, they strike the row and two balls pop out from the other end. If instead one ball popped out with twice the speed of the two, this would be a violation of conservation of | energy | 64 | |
| 1665952402 | The center of mass of a human body is located at a point that | changes as a person bends over | 65 | |
| 1665952403 | The famous Leaning Tower of Pisa doesn't topple over because its center of gravity is | above the place of support | 66 | |
| 1665952404 | A ring, a cylinder, and a solid sphere begin rolling down a hill together. Given that the rotational inertia of the solid sphere is the least and that of the ring is the most , the one to reach the bottom first is the | sphere | 67 | |
| 1665952405 | Toss a baseball bat into the air and it wobbles about its | center of mass | 68 | |
| 1665952406 | When a twirling ice skater brings her arms inward, her rotational speed | increases | 69 | |
| 1665952407 | If the Earth had two identical moons in one circular orbit, and the moons were as far apart in that orbit as they could be, the center of gravity of the Earth-moons system would be at | earth's center | 70 | |
| 1665952408 | A baseball bat is balanced on a fulcrum. The center of gravity of the bat is located | above the fulcrum | 71 | |
| 1665952409 | Inside a freely falling elevator, there would be no apparent ... for you | weight | 72 | |
| 1665952410 | According to Newton, the greater the masses of interacting objects, the | greater the gravitational force between them | 73 | |
| 1665952411 | According to Newton, doubling the distance between two interacting objects | divides by 4 the gravitational force between them | 74 | |
| 1665952412 | Passengers in a high-flying jumbo jet feel their normal weight in flight, while passengers in the orbiting space shuttle do not. This is because passengers in the space shuttle are | without support forces | 75 | |
| 1665952413 | The reason the moon does not crash into the Earth is that the | moon has a sufficient tangential speed | 76 | |
| 1665952414 | According to Kepler's laws, the paths of planets about the sun are | ellipses | 77 | |
| 1665952415 | A rock is thrown upward at 50 degrees with respect to the horizontal. As it rises, neglecting air drag, its vertical component of velocity | decreases | 78 | |
| 1665952416 | An Earth satellite is simply a projectile | freely falling around earth | 79 | |
| 1665952417 | An object is dropped and freely falls to the ground with an acceleration of 1 g. If it is thrown upward (neglecting air-resistance) at an angle instead, its acceleration will be | 1g downward | 80 | |
| 1665952418 | An Earth satellite is in an elliptical orbit. The satellite travels fastest when it is | nearest earth | 81 | |
| 1665952419 | A bullet is fired horizontally from a gun. At the same time a similar bullet is dropped from the same height. The fired bullet will (neglect air-resistance) hit the ground ... | at the same time as the dropped one | 82 | |
| 1665952420 | The acceleration due to gravity acts | downward | 83 | |
| 1665952421 | A golfer drives her golf ball from the tee down the fairway in a high arcing shot. When the ball is at the highest point of its fligh | ?? | 84 |
