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What else can I help you with?
Can acceleration ever be negative?
Acceleration is negative when the object is moving in the opposite direction. on a graph the line would be in the negative quadrant.
When an object slows down does it have acceleration?
yes, but its value is negative ( as in -x m/s¨2). However it is most often noted as deceleration.
What is the decrease of speed called in physics?
Any change of velocity, including a decrease of speed, is described and measured as acceleration. Assuming the velocity and acceleration vectors point in the same direction, then in the case of decreasing speed, the magnitude of the acceleration is a negative value. Negative acceleration is often called deceleration, but that is just a special case of acceleration.
What is negative acceleration?
Negative Acceleration:Negative Acceleration refers to an object whose speed decreases as it moves away from its original starting position.Actually, that's not entirely correct. Acceleration is a vector quantity and, therefore, depends on direction. If an object is moving in a straight line, in the negative direction, its acceleration is positive if its speed decreases with time and negative if its speed increases with time.Think of it this way: if the acceleration vector is pointed in the same direction as the way an object is moving, the object speeds up. If the acceleration vector is pointed opposite the direction of motion, it slows down.
Can an object have an eastward velocity while experiencing a westward accelerations?
The answer is yes and no.Acceleration is the rate of change of velocity. Velocity is speed plus direction.If an object is travelling eastward and slowing down in a straight line then its velocity is decreasing, it is still travelling eastward. However the force slowing the object is a westward force.A reducing acceleration (slowing down) is most often called a deceleration or negative acceleration. So you have a negative eastward acceleration.
What is Rate of change of velocity of an object?
The generic term for change in velocity is acceleration. It may be positive or negative (often called deceleration in non-scientific use) or may be a change in vector (direction of travel). This is because velocity is speed (distance covered per time unit) and direction of travel combined.
When is acceleration due to gravity positive and when is it negative?
Acceleration due to gravity is negative when an object is moving up. Accl'n due to gravity is positive when an object is moving down (since gravity acts downwards on an object). ^Acceleration due to gravity is always negative, while the acceleration of the ball upward was positive due to what threw it, not gravity.
Acceleration and deceleration movements of the head often result in polar injuries in which?
Acceleration and deceleration movements of the head can result in polar injuries in which the brain moves back and forth within the skull. This can lead to shearing forces that damage brain structures and cause diffuse axonal injury. These injuries can result in symptoms such as loss of consciousness, memory loss, and cognitive impairments.
Why is the value of retardation is negative?
Retardation, often referred to as negative acceleration, is considered negative because it indicates a decrease in the velocity of an object over time. In physics, acceleration is defined as the rate of change of velocity, and when an object slows down, its change in velocity is in the opposite direction to its motion. This results in a negative value for retardation on the acceleration scale. Thus, it signifies that the velocity is decreasing rather than increasing.
What is the medical term meaning whiplash?
The medical term for whiplash is cervical acceleration-deceleration (CAD) injury. This term describes a neck injury caused by a sudden jerking motion of the head, often occurring in car accidents. Symptoms may include neck pain, stiffness, and limited range of motion.
How do you measure or calculate deceleration during a collision?
In a controlled test condition (like crash tests on cars) an accelerometer is used to measure the rate of deceleration. It should be possible to estimate the deceleration following a collision if the speed of the vehicles at the moment of the collision is known. We could do this by measuring the amount the car was crushed/dented during the collision. We know the vehicle decelerated from its starting speed over this distance so we can estimate the average deceleration. I believe there are more sophisticated techniques used by accident investigators. As an aside, in strict physics terminology, slowing down (as well as any other change in velocity) is acceleration, not deceleration however deceleration is often used to imply a reduction in speed in every day English. If you want to get into this further have a look at "Are speed and velocity the same?" and remember that acceleration is also a vector.
What are inertia forces in fluid mechanics?
Inertia forces in fluid mechanics are caused by fluid acceleration and deceleration. They are a result of the tendency of fluid particles to resist changes in their motion. Inertia forces are often considered in the analysis of fluid flow problems to account for the effects of fluid mass and acceleration.
