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What is a possible state of an object in the absence of net force?
When no net force acts on an object, then its velocity is constant. That means that its speed and direction don't change. If it is at rest, its velocity is zero. If it is in motion, then it continues in a straight line at constant speed. The most general statement is: When net force acts on an object, then the object accelerates. When no net force acts on an object, then its acceleration is zero. Even more general than that: A = F/M . (An object's acceleration) is (the net force acting on it) divided by (its mass).
Why most of the object move in a straight line?
By Newton's Second Law, an object with no force on it will continue to move in a straight line with constant velocity.
What is an advantage of a constant-speed propeller?
Permits the pilot to select the blade angle for the most efficient performance.
Is a car on a circular track has also constant velocity?
Yes, IF it maintains constant speed on the track. The academic definition of velocity is speed and the associated direction, a vector. A car traveling in a circle is constantly changing direction. However, most people, including physicists when they are not writing textbooks, treat velocity and speed as interchangable such that a car going a constant speed on a circular track would be considered to have a constant velocity even though the direction in which it is traveling is constantly changing.
Does most wave travel at the same speed?
Not at all. For example, the speed of light in a vacuum is almost a million times faster than the speed of sound in air.
Space probes can travel millions of miles without using any fuel?
Newton's Second Law: The force applied to an object is proportional to its mass and its acceleration. What this means is that any object, traveling in a straight line, at a constant speed, requires no force to maintain that motion. Most notably, in space, where there is no air resistance to slow the object down, no engines would be required to travel, except to change speed and course.
Why do most people incorrectly think that it takes a constant force to produce a constant speed of a moving object?
because they take air resistance into consideration, if you pushed something along in space it would carry on and wouldn't stop
What is a possible state of an object in the absence of net force?
When no net force acts on an object, then its velocity is constant. That means that its speed and direction don't change. If it is at rest, its velocity is zero. If it is in motion, then it continues in a straight line at constant speed. The most general statement is: When net force acts on an object, then the object accelerates. When no net force acts on an object, then its acceleration is zero. Even more general than that: A = F/M . (An object's acceleration) is (the net force acting on it) divided by (its mass).
How do you find the most probable speed?
V_mp (most probable speed) = sqrt(2KT/m) where K is the Boltzmann constant
Which situation is most likely to show a constant rate of change?
The distance traveled by a truck driving at a constant speed compared with time.
Do most objects move at constant speed?
they do an if they dont then you die hard like mudkipz.ws/
Why most of the object move in a straight line?
By Newton's Second Law, an object with no force on it will continue to move in a straight line with constant velocity.
Why is it useful to find the average speed of a object?
Most things don't move with the same speed at all times
What was the first object to fly the speed of sound?
Most probably the end of a whip.
What is the speed of most objects and what it depend on?
Different objects can have different speeds; also, the same object can have one speed now, and a different speed later.
Is it possible to have a changing velocity and a constant speed?
Yes, the velocity of a constantly (or not constantly) accelerated object will vary. Velocity is distance per unit time with a vector. It's speed (distance per unit of time) in a given direction. Under constant acceleration, the velocity is changing at a constant rate. But the velocity is changing. It is varying. The object could be speeding up or it could be slowing down. Or it could be changing direction. Any of these change velocity. An object that is experiencing constant acceleration will have its velocity varying. Why wouldn't it have?
What is an advantage of a constant-speed propeller?
Permits the pilot to select the blade angle for the most efficient performance.
