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Physics 1 Test Study
| Term | Definition |
|---|---|
| To a fair approximation, Early Greeks knew the | The Distance and size of the Earth and Moon |
| Eratosthenes first learned about the position of the Sun in mid-summer by | consulting library information. |
| The scientific method is most effective in | gaining, organizing, and applying new knowledge. |
| The synthesis of a large collection of information that contains well-tested and verified hypotheses about certain aspects of the world is known as a scientific | theory. |
| The first scientist to be credited for postulating that Earth circled the Sun was | Copernicus. |
| The first scientist to introduce the concept of inertia was | Galileo. |
| If no external forces act on a moving object, it will | continue moving at the same speed. |
| Galileo taught us that if you roll a ball along a level surface it will | keep rolling if friction is absent. |
| If gravity between the Sun and Earth suddenly vanished, Earth would continue moving in | a straight-line path. |
| When you keep moving forward as the bus comes to stop for not holding to the railing, this illustrates _______________. | inertia. |
| A force is a vector quantity because it has both | magnitude and direction. |
| Two students engaged in a tug-of-war each pull a rope in opposite directions with a force of 400 N. The net force on the rope is | 400 N and rope tension is also 400 N. |
| A tree stump is pulled northward by a 10-N force at the same time a 25-N force pulls it southward. The resultant force has a magnitude of | 15 N. |
| When Nellie Newton hangs at rest in the middle of a clothesline, the tension will not be the same in each side of the rope when | the angles at each side of the rope are unequal. |
| Burl and Paul have a total weight of 1300 N. The tensions in the supporting ropes that support their scaffold add to 1700 N. The weight of the scaffold itself must be | 400 N. |
| A mosquito flying at 3 m/s that encounters a breeze blowing at 3 m/s in the same direction has a speed of | 6 m/s. |
| The two measurements necessary for calculating average speed are | distance and time. |
| The average speed of a horse that gallops 10 kilometers in 30 minutes is | 20 km/h. |
| An object covers a distance of 8 meters in the first second of travel, another 8 meters during the next second, and 8 meters again during the third second. Its acceleration is | 0 m/s2. |
| A cart changes its speed from 90 m/s to 100 m/s in 10 seconds. During this interval its acceleration is | 1 m/s2. |
| A car's speed 3 seconds after accelerating from rest at 2 m/s2 is | 6 m/s. |
| An apple falls from a tree and hits the ground 5 meters below with a speed of about | 10 m/s. |
| Neglecting air resistance, how fast must you toss a ball straight up in order for it to take 6 seconds to return to its initial level? | 30m/s |
| If a freely falling object were equipped with a speedometer on a planet where the acceleration due to gravity is 20 m/s2, then its speed reading would increase each second by | 20 m/s. |
| As water drops fall at a steady rate from a leaking faucet they _____________________. | get farther apart. |
| If an apple experiences a constant net force, it will have a constant _________________. | acceleration |
| A 0.1 kg mobile phone is pulled northward by a force of 8 N and at the same time pulled eastward by another force of 6 N. The resultant force on the phone is ______________. | 10 N. |
| An object's weight is properly expressed in units of __________________. | newtons. |
| A 0.1 kg mobile phone is pulled northward by a force of 8 N and at the same time pulled eastward by another force of 6 N. The acceleration of the phone is ______________. | 100m/s2 |
| The mass of a lamb that weights 110 N is about ______________________. | 11 kg. |
| An object with twice as much mass as another object has twice as much __________________. | inertia |
| In which case would you have the largest mass of gold? If your chunk of gold weighed 1 N on the | Moon. |
| When you stand at rest with your left foot on one bathroom scale and your right foot on a similar scale, each of the scales will | show readings that when added equal your weight. |
| A car by itself is capable of a certain maximum acceleration. When it tows a twice-as-massive car, its maximum acceleration is | one third. |
| A car has a mass of 1000 kg and accelerates at 2 m/s2. What net force is exerted on the car? | 2000 N |
| A 1-kg ball is thrown at 10 m/s straight upward. Neglecting air resistance, the net force that acts on the stone when it is halfway to the top of its path is about | 10 N. |
| One end of a rope is pulled with 100 N, while the opposite end also is pulled with 100 N. The tension in the rope is | 100 N. |
| Action and reaction pairs of forces | always act simultaneously. |
| When a skateboarder pushes on a wall, | the wall pushes him, there is an interaction, the wall pushed back |
| When a karate chop breaks a board with a 3000-N blow, the amount of force that acts on the hand is | 3000 N. |
Created by:
sydneyt03