What is the lewis structure for hcn? How is vsepr used to classify molecules? What are the units used for the ideal gas law? How does Charle's law relate to breathing? What is the ideal gas law constant? How do you calculate the ideal gas law constant? How do you find density in the ideal gas law?
Does ideal gas law apply to liquids? The initial and final speed of a ball at two different points in time is shown below. The direction of the ball is indicated by the arrow. For each case, indicate if there is an acceleration.
Explain why or why not. Indicate the direction of the acceleration. Even though the initial and final speeds are the same, there has been a change in direction for the object. Thus, there is an acceleration. This constitutes a leftward acceleration. Explain the connection between your answers to the above questions and the reasoning used to explain why an object moving in a circle at constant speed can be said to experience an acceleration.
See Answer An object which experiences either a change in the magnitude or the direction of the velocity vector can be said to be accelerating. This explains why an object moving in a circle at constant speed can be said to accelerate - the direction of the velocity changes. Dizzy Smith and Hector Vector are still discussing 1e. Dizzy says that the ball is not accelerating because its velocity is not changing.
Hector says that since the ball has changed its direction, there is an acceleration. Who do you agree with? Argue a position by explaining the discrepancy in the other student's argument. Agree with Hector.
A change in direction constitutes a velocity change and therefore an acceleration. The accelerator allows the car to increase speed.
The brake pedal allows the car to decrease the speed. And the steering wheel allows the car to change direction. For questions 5- 8: An object is moving in a clockwise direction around a circle at constant speed.
Use your understanding of the concepts of velocity and acceleration to answer the next four questions. Use the diagram shown at the right. Which vector below represents the direction of the velocity vector when the object is located at point B on the circle?
Which vector below represents the direction of the acceleration vector when the object is located at point C on the circle? Which vector below represents the direction of the velocity vector when the object is located at point C on the circle? Which vector below represents the direction of the acceleration vector when the object is located at point A on the circle?
The velocity vector is directed tangent to the circle; that would be downward towards the center when at the object is at point B. The acceleration vector is directed towards the center; that would be up and to the right when the object is at point C.
The velocity vector is directed tangent to the circle; that would be upwards and leftwards when at point C. The acceleration vector is directed towards the center; that would be straight down when the object is at point A.
Physics Tutorial. My Cart Subscription Selection. Velocity, being a vector, has a constant magnitude but a changing direction. The resultant force on the car is zero. 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. At constant speed, acceleration is zero, no doubt.
The magnitude of instant velocity termed as speed. Speed is a scalar quantity. At this point, the students technically already have enough evidence to see that a constant force will mean the object will move with a continuously increasing speed if the force is in the same direction as the motion of the object.
Constant speed is shown by straight lines on a graph. In other words, higher speed. Both lines are straight, so both speeds are constant. In a distance-time graph, the slope or gradient of the line is equal to the speed of the object. The steeper the line and the greater the gradient the faster the object is moving.
If an object exhibits non-uniform motion, a position-time graph of the motion will be curved, not straight.
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