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1 | |
Which of the following units could be best associated with a scalar quantity rather than a vector quantity? |
| | A) | kilogram |
| | B) | newton |
| | C) | meters per second |
| | D) | meter/second |
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2 | |
In which of the following examples is the motion of the car accelerated? |
| | A) | A car travels on a straight, flat road at the constant speed of 40 km/h. |
| | B) | A car climbs a steep hill with its speed dropping from 18 km/h at the bottom to 9 km/h at the top. |
| | C) | A car climbs a steep hill at the constant speed of 70 km/h. |
| | D) | A car rolls backwards down a steep hill at a constant speed of 70 km/h. |
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3 | |
The speedometer in a car indicates |
| | A) | an average speed during a trip. |
| | B) | a vector quantity. |
| | C) | a scalar quantity. |
| | D) | the distance the car travels. |
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4 | |
Distance |
| | A) | is equal to v x t (speed times time). |
| | B) | can be measured using the unit of meters/second. |
| | C) | is an equivalent to time in Newton's theory of universal gravitation. |
| | D) | can be expressed using a vector unit such as newtons. |
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5 | |
According to the Pythagorean theorem, |
| | A) | the shortest distance between any two objects is a straight line. |
| | B) | the cube root of the hypotenuse of a right triangle is equal to the square root of the sum of the sides. |
| | C) | if a right triangle has short sides of 3 cm and 4 cm, then the long side must be 5 cm. |
| | D) | vector quantities can be added, but not subtracted. |
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6 | |
In a vacuum on the surface of earth, the acceleration of a brick dropped downward is |
| | A) | greater than that of a small stone dropped downward. |
| | B) | the same as that of a small stone dropped downward. |
| | C) | less than that of a feather dropped downward. |
| | D) | zero since there is no air resistance in a vacuum. |
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7 | |
The weight of an object |
| | A) | is unrelated to the quantity of matter it contains. |
| | B) | is the force with which it is attracted to the earth. |
| | C) | is the same thing as its mass but is expressed in different units. |
| | D) | can be measured using newtons (SI system) or pounds (British system). |
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8 | |
How fast you are moving is a property of motion known as |
| | A) | speed. |
| | B) | velocity. |
| | C) | acceleration. |
| | D) | momentum. |
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9 | |
How fast you are moving in which direction is a property of motion known as |
| | A) | speed. |
| | B) | velocity. |
| | C) | acceleration. |
| | D) | momentum |
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10 | |
How fast you are changing your speed or direction of travel is a property of motion known as |
| | A) | speed. |
| | B) | velocity. |
| | C) | acceleration. |
| | D) | none of the above. |
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11 | |
Ignoring air resistance, an object falling toward the surface of the earth has a velocity that is |
| | A) | constant. |
| | B) | increasing. |
| | C) | decreasing. |
| | D) | acquired instantaneously. |
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12 | |
Ignoring air resistance, an object falling toward the surface of the earth has an acceleration that is |
| | A) | constant. |
| | B) | increasing. |
| | C) | decreasing. |
| | D) | dependent on the weight of the object. |
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13 | |
A ball rolling across the floor slows to a stop because |
| | A) | there are unbalanced forces acting on it. |
| | B) | the force that started it moving wears out. |
| | C) | all the forces are balanced. |
| | D) | the net force equals zero. |
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14 | |
Ignoring air resistance, a bullet fired horizontally has how many forces acting on it after leaving the rifle? |
| | A) | One, from the gunpowder explosion. |
| | B) | One, from the pull of gravity. |
| | C) | Two, one from the gunpowder explosion and one from gravity. |
| | D) | Three, one from the gunpowder explosion, one from gravity, and one from the motion of the bullet. |
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15 | |
The tendency of a moving object to remain in unchanging motion in the absence of an unbalanced force is called |
| | A) | inertia. |
| | B) | free fall. |
| | C) | acceleration. |
| | D) | impulse. |
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16 | |
A heavy object and a light object are dropped from rest at the same time in a vacuum. The heavier object will reach the ground |
| | A) | before the lighter object. |
| | B) | at the same time as the lighter object. |
| | C) | after the lighter object. |
| | D) | It depends on the shape of the object. |
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17 | |
A cannonball is fired straight up at 50 m/s. Neglecting air resistance, when it returns to its starting point its speed |
| | A) | is 50 m/s. |
| | B) | is more than 50 m/s. |
| | C) | is less than 50 m/s. |
| | D) | depends on how long it is in the air. |
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18 | |
A change in the state of motion is evidence of |
| | A) | a force. |
| | B) | an applied force that is unbalanced. |
| | C) | a force that is wearing down. |
| | D) | any of these. |
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19 | |
What do you know for sure about the forces on the system of you and a bicycle as you petal the bike at a constant speed in a straight line? |
| | A) | The applied force you are exerting on the petal is greater than other forces. |
| | B) | All forces are in balance. |
| | C) | The resisting forces of friction are greater than the applied forces. |
| | D) | Air and tire friction forces are less than the applied force. |
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20 | |
What property of matter determines the resistance to a change in the state of motion for a given object? |
| | A) | weight |
| | B) | density |
| | C) | mass |
| | D) | any of these |
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21 | |
With all other factors equal, if you double the unbalanced force on an object of a given mass the acceleration will be |
| | A) | doubled. |
| | B) | increased fourfold. |
| | C) | increased by one-half. |
| | D) | increased by one-fourth. |
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22 | |
With all other factors equal, if you double the mass of an object while a constant unbalanced force is applied, the acceleration will be |
| | A) | doubled. |
| | B) | increased fourfold. |
| | C) | one-half as much. |
| | D) | one-fourth as much. |
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23 | |
Which of the following is a unit that can be used for a measure of weight? |
| | A) | kilogram |
| | B) | newton |
| | C) | kg × m/s |
| | D) | none of these |
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24 | |
Which of the following is a unit for a measure of resistance to a change of motion? |
| | A) | lb |
| | B) | kg |
| | C) | N |
| | D) | none of the above |
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25 | |
The immediate source of the force that accelerates a car over a road comes from |
| | A) | the engine. |
| | B) | the tires. |
| | C) | the road. |
| | D) | all of these. |
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26 | |
Doubling the distance between an orbiting satellite and the earth will result in what change in the gravitational attraction between the two? |
| | A) | one-half as much |
| | B) | one-fourth as much |
| | C) | twice as much |
| | D) | four times as much |
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