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When you are looking at the speedometer in your car are you reading the average or the instantaneous velocity?
The speedometer of a car reveals information about the instantaneous speed of your car. It shows your speed at a particular instant in time. On the average, your car was moving with a speed of 25 miles per hour.
When you look at your speedometer and it reads 60 mph this is your instantaneous speed True or false?
If a car travels around a gentle curve on a highway at 60km/h the velocity does not change. A car’s speedometer shows instantaneous speed because the speedometer shows the cars speed while the car is moving at that moment.
When we discuss the motion of something its motion is described relative to the motion of something else?
You can describe the motion of an object by its position, speed, direction, and acceleration. An object is moving if its position relative to a fixed point is changing. Even things that appear to be at rest move.
When a car rounds a corner at a constant speed?
When a car rounds a corner at a constant speed, its acceleration is zero. A ball is thrown into the air. At the highest point of its path, the ball has zero velocity and zero acceleration.
What is the speed of an object at rest?
Answer: The speed of an object which is at rest is 0 m / s .
Can you use a car’s speedometer only to tell if the car is moving at a constant velocity Why or why not?
No. If the speedometer always reads 40 km/h, you can say that the car had a constant speed, but not constant velocity. If the direction of the car changed – even at the same speed – then its velocity changed. … Since the car’s change in velocity is zero, its acceleration is zero.
Does a car’s odometer and speedometer give an accurate measure of the car’s velocity?
The speedometer of a car shows its instantaneous speed (as we understand it) and not the average speed. Technically, instantaneous speed is also average speed, but calculated over a very, very small time period. Speed is nothing but a ratio of distance traveled and time taken.
What does the odometer tell you?
An odometer is a device that is used for measuring the distance traveled by a vehicle. The odometer is usually situated in the vehicle’s dashboard. The word “odometer” is derived from two Greek words meaning path and measure. … A windowed casing shows only the current mileage of the vehicle and not the mechanical parts.
What is constant speed?
Definition: When the speed of an object remains the same – it does not increase or decrease – we say it is moving at a constant speed.
Why does a car speedometer only have positive values?
Answer: Because it’s measure the speed according to the car distance traveled and not the direction of the car movement.
Is speed and average speed same?
Speed can be thought of as the rate at which an object covers distance. … The average speed of an object in an interval of time is the distance travelled by the object divided by the duration of the interval; the instantaneous speed is the limit of the average speed as the duration of the time interval approaches zero.
How do you describe a motion graph?
Summary: A speed – time graph shows us how the speed of a moving object changes with time. The steeper the graph, the greater the acceleration. A horizontal line means the object is moving at a constant speed. A downward sloping line means the object is slowing down.
How do you describe the state of motion?
The state of motion of an object is defined by its velocity – the speed with a direction. Thus, inertia could be redefined as follows: Inertia: tendency of an object to resist changes in its velocity. … Such an object will not change its state of motion (i.e., velocity) unless acted upon by an unbalanced force.
When can we say an object is in motion?
If an object is observed from a position, then if the object changes its positions with respect to time then the object is said to be in motion. An object is said to be in motion when an force is applied to it and the force causes a change in position when compared to a stationary object.
When a car goes around the corner at 20 miles per hour Why do we say it accelerates?
The car is accelerating because it’s changing direction. When a car goes around a corner at 20 mph, why do we say it accelerates? When something changes position or moves.
Can an object be moving if its acceleration is zero?
4) a) Can an object be moving when its acceleration is zero? … Yes, an object that was set in motion in the past by some force, but that is no longer being acted on by a net force, is moving but with zero acceleration, i.e. it is moving at constant velocity.
Is it true that acceleration only takes place when speeding up?
Yes, that’s right, a change in the direction of motion results in an acceleration even if the moving object neither sped up nor slowed down. … Acceleration occurs anytime an object’s speed increases or decreases, or it changes direction. Much like velocity, there are two kinds of acceleration: average and instantaneous.
What keeps the object remain at rest?
Inertia is a force which keeps stationary objects at rest and moving objects in motion at constant velocity. Inertia is a force which brings all objects to a rest position. All objects have inertia. A more massive object has more inertia than a less massive object.
What is the relationship of speed and position of object?
The greater the speed an object has, the faster it changes position.
How can speed be calculated?
To solve for speed or rate use the formula for speed, s = d/t which means speed equals distance divided by time. To solve for time use the formula for time, t = d/s which means time equals distance divided by speed.
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