Chapter 1 and 2 Physics tests
Which of the following is a problem that some people blame on technology?
widespread pollution
If an object in motion is unchanged, it is said to be:
in dynamic equilibrium
One difference between a hypothesis and a theory is that a hypothesis
is a guess that has not been well tested whereas a theory is a synthesis of well tested guesses
A scalar quantity has
only magnitude
A 100-N lantern is suspended by a pair of ropes with 120 degrees between them (Each 60 degrees from the vertical). The tension in each rope is
100N
What is the maximum resultant possible when adding a 2-N force to and 8-N force?
10N
The value for the speed of light is
186,000 miles/sec
A girl whose weight is 500 N hands from the middle of a bar supported by two vertical strands of rope. What is the tension in each strand?
250N
A 5-N force and a 30-N force act in the same direction on an object. What is the net force on the object ?
35N
A 15-N force and a 45-N force act on an object in opposite directions. What is the net force on the object
3oN
What is the minimum resultant possible when adding a 5-N force to an 8-N force?
5N
Which of the following statements is not true?
A good scientist is influenced by his or her likes and dislikes
Physics is the most basic Science because
All of the above
Which of these is a scientific hypothesis
Atoms are the smaller particles of matter that exist
A barge is being pulled along a canal by two ropes that make equal angles with the direction in which the barge points. Assuming the two pulls on the barge are equal, in what direction does the barge move?
Both B and C: B-It moves straight ahead C- it moves in the direction of the resultant force on it
Which one of the following problems would not be part of Physics?
Identifying all the bones in the human body
You are helping your aunt move a piano on wheels from one too to another. When you push the piano horizontally, it moves at a constant speed. What can you say about the piano.
It is in dynamic equilibrium
Which of the following steps is not a part of the scientific method?
Repeat the Experiments until the answers math the predictions
A science teacher, an art instructor and a religious studies teacher are arguing about their respective disciplines. Which of the following could be a claim that each teacher makes?
The goal of my discipline is to search for order and meaning in the world.
A theory is
a synthesis of a large collection of information including well tested guesses.
Equilibrium occurs when
all of the above
In order to find the components of a vector, you should
all of the above
Science, art and religion do not contradict one another because
all three have different domains
A hypothesis is
an educated guess that has yet to be proven by experiment
The difference between a hypothesis and a theory is that a hypothesis is
an educated guess where as a theory has been tested successfully many times in many ways.
What is needed to describe a vector quantity?
both magnitude and direction
A scientific fact is
close agreement by competent observers of observations of the same phenomena.
The basic unit used by scientist to describe length is the:
meter
A clothesline os stretched between two trees. A tire hangs in the middle of the line and the two halves of the line make equal angles with the horizontal. The tension in the line is
more than half the tires weight
To test a scientific hypothesis you would
set up many experiments and look at the results
The weight of a person can be represented by a vector that acts
straight down, even if the person is standing on a hill
Which of the following is a reason to express scientific findings mathematically?
the findings become easier to verify by experiment
An objects mass on the moon would be the same as its mass on earth.
true
What would be the safest war to put up a clothesline
with some slack in the line
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 that it is
wrong