Circular is correct.
It must travel in a vacuum
B)
It must have a medium.
C)
It must travel in empty space.
D)
Both sound and light are examples
Considering all the standard characteristics of acceleration, which involves the change in velocity concerning time, the statements (B), (C) and (D) are correct.
The given problem is based on the concepts and the fundamentals of acceleration. Acceleration is defined as the rate of change of velocity. Velocity is a vector quantity and is defined as speed in a given direction. Therefore, when any or both of the components of velocity is changing with time, a body is said to be accelerating i.e. acceleration involves a change of speed or change in direction, or a change in both speed and direction.
Now, as per the given problem,
A. Acceleration always involves changing speed is an incorrect statement because acceleration can occur when speed is constant but direction is changing.
B. Changing direction always involves acceleration is a correct statement because, a change in direction results in a change in velocity.
C Changing speed always involves acceleration is a correct statement because, changing speed results in a change in velocity.
D. Circular motion always involves acceleration is also a correct statement because in circular motion the direction is always changing, and this results in a change in velocity.
Thus, we can conclude that considering all the standard characteristics of acceleration, which involves the change in velocity concerning time, the statements (B), (C) and (D) are correct.
Learn more about the acceleration here:
Answer:
A. Acceleration always involves changing speed.
Explanation:
Acceleration is defined as the rate of change of velocity.
Velocity is a vector quantity and is defined as speed in a given direction. Therefore, when any or both of the components of velocity is changing with time, a body is said to be accelerating i.e. acceleration involves a change of speed or change in direction, or a change in both speed and direction.
Considering the statements:
A. Acceleration always involves changing speed is false because acceleration can occur when speed is constant but direction is changing.
B. Changing direction always involves acceleration is true because, a change in direction results in a change in velocity.
C Changing speed always involves acceleration is true because, changing speed results in a change in velocity.
D. Circular motion always involves acceleration is true because in circular motion the direction is always changing, and this results in a change in velocity
The approximate horizontal component of the initial velocity is 12.3 m/s
When an object is thrown at an angle from the horizontal direction, the object is said to be in projectile motion. The object which follows the projectile motion.
Given is Ronnie kicks a playground ball with an initial velocity of 16 m/s at an angle of 40° relative to the ground.
The horizontal component of the projectile is
Vx= V cosθ
Substitute the values, we get
Vx = 16 cos(40) =
Vx =12.3 m/s
Thus, approximate horizontal component of the initial velocity is 12.3 m/s.
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O A. Celsius
O B. Fahrenheit
O C. Kelvin
Answer:
It is C the kelvin scale
Explanation:
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2. The motion of freely falling body is an example of ----- motion.
a) Uniform motion b) Non -uniform motion c) Uniformly accelerated motion. d) None of these.
Answer:
A
Explanation:
acceleration is defined as the rate of change of velocity with time