Conceptual Physics Test 1-3

In science an educated guess is A) A theory B) A hypothesis B) Both of these

A hypothesis

Disregarding air resistance, objects fall with constant A) Acceleration. B) Velocity. C) Distances each successive second. E) Speed.

Acceleration

In each second of fall, the distance a freely falling object will fall is A) Increasing. B) The same, but not 5 m or 10 m. C) About 10 m. D) About 5 m. E) None of these

Increasing

The muzzle velocity of a bullet fired from a new rifle is 100 m/s. Neglecting air resistance, at the end of one second a bullet fired straight up into the air will have traveled a distance of A) (100 + 4.9) m. B) 100 m. C) 4.9 m. D) (100 - 4.9) m. E) None of these

(100-4.9) m

The force of friction on a sliding object is 10 N. The applied force needed to maintain a constant velocity is A) Less than 10 N. B) More than 10 N. C) 10 N.

10 N

An object falls freely from rest on a planet where the acceleration due to gravity is 20 meters per second squared. After 5 seconds, the object will have a speed of A) 50 m/s. B) 100 m/s. C) 20 m/s. D) 10 m/s. E) 5 m/s.

100 m/s

A horse gallops a distance of 10 kilometers in a time of 30 minutes. Its average speed is A) 30 km/h. B) 15 km/h. C) 20 km/h. D) 40 km/h.

20 km/h

An object at rest near the surface of a distant planet starts to fall freely. If the acceleration there is twice that of the Earth, its speed one second later would be A) 30 m/s. B) 40 m/s. C) 10 m/s. D) 20 m/s.

20 m/s

If a freely falling object were somehow equipped with a speedometer on a planet where the acceleration due to gravity is 20 m/s/s, then its speed reading would increase each second by A) 20 m/s. B) 40 m/s. C) 10 m/s. D) 30 m/s. E) depends on its initial speed

20 m/s

A 300-kg bear grasping a vertical tree slides down at constant velocity. The friction force between the tree and the bear is A) 30 N. B) 3000 N. C) 300 N. D) More than 3000 N.

3000 N

If a rocket initially at rest accelerates at a rate of 50 m/s2 for one minute, its speed will be A) 3600 m/s. B) 500 m/s. C) 3000 m/s. D) 50 m/s.

3000 m/s

A man leans over the edge of a cliff and throws a rock upward at 4.9 m/s. Neglecting air resistance, one second later the rock's speed is A) 9.8 m/s. B) Zero. C) 4.9 m/s. D) 14.7 m/s. E) None of the above

4.9 m/s

A man weighing 800 N stands at rest on two bathroom scales so that his weight is distributed evenly over both scales. The reading on each scale is A) 400 N. B) 800 N. C) 200 N. D) None of these

400 N

If a car increases its velocity from zero to 60 km/h in 10 seconds, its acceleration is A) 3 km/h/s. B) 10 km/h/s. C) 6 km/h/s. D) 600 km/h/s. E) 60 km/h/s.

6 km/h/s

In science, a theory is A) less than a fact B) A synthesis of a large body of well tested knowledge C) Unchangeable D) An educated guess

A synthesis of a large body of well tested knowledge

A package falls off a truck that is moving at 30 m/s. Neglecting air resistance, the horizontal speed of the package just before it hits the ground is A) About 30 m/s. B) Zero. C) More than 30 m/s. D) Less than 30 m/s but larger than zero. E) More information is needed for an estimate.

About 30 m/s

A ball is thrown upwards. Neglecting air resistance, what initial upward speed does the ball need to remain in the air for a total time of 10 seconds? A) About 100 m/s B) About 80 m/s C) About 110 m/s D) About 50 m/s E) About 60 m/s

About 50 m/s

Hang from a pair of gym rings and the upward support forces of the rings will always A) Add up to equal your weight. B) Each be half your weight. C) Each equal your weight.

Add up to equal your weight

When you stand at rest on a pair of bathroom scales, the readings on A) The scales will always B) Each equal your weight. C) Each be half your weight. D) Add up to equal your weight.

Add up to equal your weight

Science is a body of knowledge that A) Condenses knowledge into testable laws. B) Is an ongoing activity of humans. C) All of the above choices are correct. D) Describes order in nature. E) None of the above choices are correct.

All of the above choices are correct

An object in mechanical equilibrium is an object at rest. A) Having no acceleration. B) Moving with constant velocity. C) All of these

All of these

Which of the following involves passion, talent, and intelligence? A) Literature B) Science C) Art D) Music E) All of these

All of these

Science, art, and religion do not contradict one another because A) If you choose science, you can forget about religion and art. B) If you choose the right one, you can forget the other two. C) If you choose religion and art, you can forget about science. D) All three have different domains.

All three have different domains

According to Newton's law of inertia, a railroad train in motion should continue going forever even if its engine is turned off. We never observe this because railroad trains A) Always have forces that oppose their motion. B) Must go up and down hills. C) Move too slowly. D) Are much too heavy.

Always have forces that oppose their motion

The easiest way for you to measure the distance between the Earth and the moon is to place in your line of sight to the moon a A) Magnifying glass. B) Meter stick. C) Telescope. D) Coin.

Coin

Eratosthenes learned about the position of the sun on June 22 by A) setting up a stick at Alexandria. B) consulting library information. C) setting up sticks at both Syene and Alexandria. D) setting up a stick at Syene. E) None of the above choices are correct.

Consulting library information

If no external forces are acting on a moving object, it will A) Move slower and slower until it finally stops. B) Continue moving at the same velocity. C) Continue moving at the same speed.

Continue moving at the same velocity

A ball tossed vertically upward rises, reaches its highest point, and then falls back to its starting point. During this time the acceleration of the ball is always A) Directed downward. B) In the direction of motion. C) Opposite its velocity. D) Directed upward.

Directed downward

A truck is moving at constant velocity. Inside the storage compartment, a rock is dropped from the midpoint of the ceiling and strikes the floor below. The rock hits the floor A) Ahead of the midpoint of the ceiling. B) Exactly below the midpoint of the ceiling. C) Behind the midpoint of the ceiling. D) More information is needed to solve this problem. E) None of these

Exactly below the midpoint of the ceiling

Whereas Aristotle relied on logic in explaining nature, Galileo relied on A) Logic also. B) Mathematics. C) Experiment. D) Patterns.

Experiment

Whirl a rock at the end of a string and it follows a circular path. If the string breaks, the tendency of the rock is to A) Continue to follow a circular path. B) Revolve in a smaller circle. C) Increase its speed. D) Follow a straight-line path.

Follow a straight line path

Science and technology are A) Responsible for all the bad in the world. B) Really one and the same. C) Fundamentally different from each other. D) Responsible for all the good in the world.

Fundamentally different from each other

The scientific method is most effective in making theories. A) Gaining, organizing, and applying new knowledge. B) Performing experiments. C) Discovering new things. D) Making hypotheses.

Gaining, organizing, and applying new knowledge

The scientist to first introduce the concept of inertia was A) Aristotle. B) Galileo. C) Copernicus. D) Newton.

Galileo

Consider drops of water that leak at a steady rate from a dripping faucet. As the drops fall they A) Remain at a relatively fixed distance from one another. B) Get farther apart. C) Get closer together.

Get farther apart

When a scientist is dishonest and reports false information, he or she A) Like in so many other professions, will be excused by the scientific community. B) Gets no second chance in the scientific community.

Gets no second chance in the scientific community

If your automobile runs out of fuel while you are driving, the engine stops but you do not come to an abrupt stop. The concept that most explains why is A) Acceleration. B) Inertia. C) Resistance. D) Gravity.

Inertia

A bullet is fired straight down from the top of a high cliff. Neglecting air resistance, the acceleration of the bullet in meters per second per second A) Is 9.8. B) Is less than 9.8. C) Is more than 9.8. D) Depends on the height of the cliff.

Is 9.8

A bullet is dropped into a river from a very high bridge. At the same time, another bullet is fired from a gun, straight down towards the water. Neglecting air resistance, the acceleration just before striking the water A) Is the same for each bullet. B) Is greater for the fired bullet. C) Depends on how high they started. D) Is greater for the dropped bullet. E) None of these

Is the same for each bullety

In science, facts A) Mean very little B) Are more Important than theories C) Are absolute D) May change

May change

Twelve seconds after starting from rest, an object falling freely will have a speed of A) 10 m/s. B) More than 100 m/s. C) 50 m/s. D) 100 m/s.

More than 100 m/s

Someone standing at the edge of a cliff throws one ball straight up and another ball straight down at the same initial speed. Neglecting air resistance, the ball to hit the ground below the cliff with the greater speed will be A) The one thrown upward. B) The one thrown downward. C) Neither -- they will both hit with the same speed.

Neither --they will both hit with the same speed

When a rocket ship accelerating in outer space runs out of fuel, it A) Accelerates for a short time, then slows down to a constant velocity. B) No longer accelerates. C) Accelerates for a short time, slows down, and eventually stops.

No longer accelerates

Starting from rest, the distance a freely falling object will fall in 0.5 second is about A) 10 m. B) 1 m. C) 1.00 m. D) None of the above

None of the above

While a car travels around a circular track at a constant speed, its A) Inertia is zero. B) Acceleration is zero. C) Velocity is zero. D) None of the above

None of the above

Of the sciences known as physics, chemistry, and biology, the most basic is A) Chemistry. B) Physics. C) Biology. D) None in particular, as each may be considered fundamental.

Physics

The safest way for you to view the sun is with A) Colored sunglasses. B) Pinhole images. C) Binoculars. D) A telescope.

Pinhole images

Galileo's use of inclined planes allowed him to effectively eliminate friction. A) Increase the acceleration beyond that of free fall. B) Slow down the acceleration of free fall. C) Eliminate the acceleration of free fall.

Slow down the acceleration of free fall

The statement, "There are regions beneath the Earth's crust that will always be beyond the reach of scientific investigation," is a A) Hypothesis. B) Fact. C) Speculation. D) Theory. E) Scientific statement.

Speculation

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 A) Gravity tends to hold the milk carton secure. B) There is an action-reaction pair of forces. C) The milk carton has inertia. D) The milk carton has no acceleration. E) None of these

The milk carton has inertia

Which of the following is a scientific statement A) There are parts of the universe that will never be found by man. B) Matter is filled with undetectable particles. C) There are things we will never know about. D) The moon is made of green cheese. E) None of these

The moon is made of green cheese

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 A) Hypothesis. B) Law or principle. C) Fact. D) Theory. E) None of these

Theory

Galileo's interpretation of motion differed from Aristotle's in that Galileo emphasized A) The role of distance in describing motion. B) The acceleration of free fall. C) Time rates. D) All of these E) None of these

Time rates

A scientific hypothesis may turn out to be right or it may turn out to be wrong. If it is a valid hypothesis, there must be a test for proving it A) Right B) Wrong

Wrong

A ball is thrown 125 meters upward and then falls the same distance back to Earth. Neglecting air resistance, its total time in the air is A) About 15 seconds. B) About 10 seconds. C) More than 20 seconds. D) About 5 seconds.

about 10 seconds

A truly educated person is knowledgeable about A) science. B) the arts. C) religion. D) all of the above

all of the above