Integrated science final
A 2000-kg car experiences a braking force of 10,000 NAND skids to a stop in 6s. The speed of the car just before the brakes were applied was
30 m/s
If a basebakk being thrown goes from zero to 30 m/s in .1 s, what is its average accaleration?
300 m/s squared
On the surface of Jupiter, where the acceleration due to gravity is south three themes that of earth, a 100- kg rock would have he weight of about
3000
A car whose mass is 2,000 kg is accelerated uniformly from rest to a speed of 15 m/s in 10 s on a level highway. The net force accelerating the card is
3000 N
A300- kg bear grasping a vertical tree slides down at constant velocity. The friction force between the tree and the bear is
3000 N
On the surface of Jupiter, where the acceleration due to gravity is about three times that of earth, a 100- kg rock would have a weight of about
3000 N
On the surface of a distant planet a 5 kg mass weighs 20 N. what is the acceleration due to gravity there
4 m/s squared
Starting from rest, the distance if a freely falling object will fall in 10s is about
500 m
Science is a body of knowledge that goes back to
Humankind's beginnings
In science, an educated guess is a
Hypothesis
A newton is equivalent to which of the following quantities
Kg times m/s squared
Whereas Aristotle relied on logic in explaining nature, Galileo relied on
Experiment
Which of the following is a cause of an acceleration
Force
Which one if the following is the cause of an acceleration?
Force
A force that one surface exerts on another when the two rub against each other is called
Friction
The scientific method is a method for
Gaining new knowledge
When a scientist is dishonest and reports false information, he or she
Gets no second chance in the scientific community
In order to catch a ball, a baseball player Extens the hand forward before impact with the ball and then let it ride back word in the direction of the balls in motion upon impact. Doing this reduces the force of impact on the players hand principally because the
Time of impact is increased
Newton's third law of motion involves the interactions of
Two objects and two forces
As an object freely falls, it's
Velocity increases
The average speed of a horse that gallops a distance of 10 km in a time of 30 min is
29 km/h
What is the speed of a free- falling object in the 3rd second
29.4m/sec/sec
Scientists repeat experimental findings in order to
.......
The force of friction on a sliding object is 10 N . The applied force needed to maintain a constant velocity is
10 N
A car accelerates at 2 m/s squared. Assuming the car started from rest, how far will it travel In 10 s
100 m
Ten seconds after starting from rest, a freely falling object on earth will age a speed of about
100 m/s
Bob and sue are having tug of war. Bob is exerting 300 N of force in the right direction. Sue is exerting 174 N of force in the left direction. Mary comes to help sue. What force would she need to exhort to have a net force of 0 on the system? Direction?
126 N to the left
In science, a theory is
A synthesis of a large body of well-tested knowledge.
A force of 10 n applied to a given mass accelerates at 1 m/s squared. The same force applies to a mass one- half as great would produce an acceleration of
2 m/s squared
A car is traveling at 22 m/s and comes to an abrupt stop in .1 s when it hits a tree. What is the deceleration in m/s squared of the car ?
220
A 4 kg bought has an amendment to him of 12 kg times meters per second. What is the ball speed
3 m/s
In a scientific experiment, a control is
A way to study the effects of just one experiment variable and a test that duplicates an experiment test except for one variable.
A and B are two objects with masses 100 kg and 75 kg respectively, then
A will have more inertia
A moving object on the voyage no forces are acting will continue to move with constant
Acceleration
When you stand at rest on a pair of bathroom scales, the readings on the scales will always
Add to equal your weight
Using science to analyze nature
Adds depth to our understanding and therefore adds to our appreciation of nature.
Science, art, and religion do not contradict one another because
All three have different domains
Which has zero acceleration
An object moving at constant velocity, an object at rest, and an object in mechanical equilibrium.
A kilogram is a measure of an objects
Mass
Density is the ratio of
Mass to volume
Compared with a 1-kg block of solid iron, a 2-kg block of solid iron has twice as much
Mass, inertia, and volume
Which of the following involves passion, talent, and intelligence
Music, science, art, and literature
The impulse momentum relationship is a direct result of
Newtons second law
Of the sciences known as physics, chemistry, and biology, the most basic is
Physics
What law is used to solve the following problem for c?
Pythagorean theorem
Science and technology are
Related to one another, but are not the same thing.
When a falling object reaches its terminal velocity its acceleration is
Same as it's speed
The statement, there are regions beneath earth's crust that will always be beyond the reach of scientific investigation, is a
Speculation
Which of the statements about the acceleration of an object is correct
The acceleration of an object is directly proportional to the net external force acting on the object and inversely proportional to the mass of the object.
A truly educated person is knowledgeable about
The arts, science, and religion
An object weighs 30 N on earth. A second object weighs 30 N on the moon. Which has the greater mass?
The one on the moon
If experimental findings are not reproducible
The results are considered valid.