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What is the velocity time graph for a car first accelerating and then decelerating uniformly?
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∙ 9y ago
The velocity-time graph for a car first accelerating and then decelerating uniformly would have a positive slope during acceleration, representing an increase in velocity, and then a negative slope during deceleration, showing a decrease in velocity. The graph would form a "V" shape with two straight lines meeting at a point where the acceleration changes to deceleration.
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To calculate the acceleration of an automobile you must first subtract the final speed from the initial speed true or false?
False. To calculate the acceleration of an automobile, you must divide the change in velocity (final speed minus initial speed) by the time taken to achieve that change in velocity. This change in velocity can be positive or negative, depending on whether the automobile is accelerating or decelerating.
Is projectile motion is an example of uniformly accelerated motion in two dimensions?
Yes, projectile motion is an example of uniformly accelerated motion in two dimensions. This is because the acceleration due to gravity acts vertically downwards throughout the motion, causing the object to accelerate at a constant rate in the vertical direction while moving horizontally at a constant velocity.
Who discovered terminal velocity?
Terminal velocity was first described by Sir Isaac Newton in the 17th century. He demonstrated that as an object falls through a fluid, such as air, it experiences drag force that increases as its speed increases. Eventually, the drag force will equal the force of gravity, causing the object to stop accelerating and reach a constant velocity known as terminal velocity.
What is the acceleration of an object if velocity remains constant?
velocity is the first derivative of motion, with acceleration being the second; if an object has a constant velocity, then it's acceleration is 0. This is easy to see from everyday life, when you are in a car, you only feel it jerk when you are accelerating but once you've reached your speed you feel nothing.
It is physically impossible for an object to have a negative acceleration and yet be speeding up?
An object with a negative acceleration is slowing down, not speeding up. Negative acceleration means the object is decelerating or moving in the opposite direction of its velocity, causing it to slow down. Objects speed up when their acceleration is in the same direction as their velocity.
To calculate the acceleration of an automobile you must first subtract the final speed from the initial speed true or false?
False. To calculate the acceleration of an automobile, you must divide the change in velocity (final speed minus initial speed) by the time taken to achieve that change in velocity. This change in velocity can be positive or negative, depending on whether the automobile is accelerating or decelerating.
Can the net force on an object ever equal zero?
Poorly phrased question as the correct answer is merely "Yes, you can." To answer the question probably intended: "How do you distinguish between one object experiencing zero net force and another experiencing non-zero net force?"The first object will be at rest or will have a constant velocity (i.e. speed and direction). The second will have a changing velocity (i.e. a changing speed and/or direction of motion) or, in other words, it will be accelerating (or decelerating).
Is projectile motion is an example of uniformly accelerated motion in two dimensions?
Yes, projectile motion is an example of uniformly accelerated motion in two dimensions. This is because the acceleration due to gravity acts vertically downwards throughout the motion, causing the object to accelerate at a constant rate in the vertical direction while moving horizontally at a constant velocity.
What is quasigeostrophic vertical velocity?
Quasi-geostropic vertical velocity is a unified equation for the vertical velocity of fluid parcels. This equation involves a system of two coupled differential equations. The first is a vorticity equation which comes from the dynamics of uniformly rotating flows. The second is one that depends on the distinctive properties of the considered fluid.
Why are you always accelerating when you ride a carousel?
Because you are traveling in a curved path. Acceleration is the time rate of change of velocity. Velocity is a vector quantity. A vector has both a magnitude and a direction. Even if you move at uniform speed in a circle, your velocity is constantly changing, because your direction is changing. The acceleration is also a vector, and points in the direction that the velocity is changing. To speak more precisely, the acceleration is the first time derivative of the velocity, while the velocity is the first time derivative of the position.
Who discovered terminal velocity?
Terminal velocity was first described by Sir Isaac Newton in the 17th century. He demonstrated that as an object falls through a fluid, such as air, it experiences drag force that increases as its speed increases. Eventually, the drag force will equal the force of gravity, causing the object to stop accelerating and reach a constant velocity known as terminal velocity.
What is the acceleration of an object if velocity remains constant?
velocity is the first derivative of motion, with acceleration being the second; if an object has a constant velocity, then it's acceleration is 0. This is easy to see from everyday life, when you are in a car, you only feel it jerk when you are accelerating but once you've reached your speed you feel nothing.
It is physically impossible for an object to have a negative acceleration and yet be speeding up?
An object with a negative acceleration is slowing down, not speeding up. Negative acceleration means the object is decelerating or moving in the opposite direction of its velocity, causing it to slow down. Objects speed up when their acceleration is in the same direction as their velocity.
A car travels 30 m in 5 sec after accelerating for 3 seconds it travels 20 m in 2 seconds Calulate the cars acceleration?
First you need to find the two different speeds of the car which is the distance/time. We find that the car first travels at an average of 6ms-1 and then after accelerating has a speed of 10ms-1. Acceleration is the rate of change of velocity over time, our change of velocity being 10-6=4ms-1 and the change in time being stated as 3 seconds we can convert this into... (4/3)ms-2
Who first developed the correct ideas about the accelerating of gravity?
Galileo
How does friction prevent us from observing Newton's First Law in the real world?
As we roll down a marble on a horizontal floor with some velocity then it is expected to keep rolling on with the same velocity (both magnitude and direction to be constant). But it is brought to rest. So out of two parts in Newtons's first law, the second part cannot be easily demonstrated. That part says that unless an external force acts the uniformly moving body continues to do so.
How would the first law of motion describe a car being pushed off something and accelerating downward?
first law deals with unforced bodies, pushing the car involves an impulse force, once off the cliff the force of gravity takes over , resulting in impulse force until it hits the ground f=m*a but a = velocity change/time, so: force * time/mass= velocity change
