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1 lip 2024 · Planes fly at typical average speeds of around 250 m/s. Calculate the distance travelled by a plane moving at this average speed for 2 hours. Answer: Step 1: List the known quantities. Average speed = 250 m/s; Time taken = 2 hours; Step 2: Write the relevant equation. Step 3: Rearrange to make distance moved the subject. Step 4: Convert any units
An airplane flying at a constant 270 m/s (600 mph), a sloth walking at a constant 0.4 m/s (1 mph), and a couch potato lying motionless in front of the TV for hours will all have the same acceleration-time graphs — a horizontal line collinear with the horizontal axis.
Although speed and velocity are often words used interchangeably, in physics, they are distinct concepts. Velocity (v) is a vector quantity that measures displacement (or change in position, Δs) over the change in time (Δt), represented by the equation v = Δs/Δt.
Calculate the average velocity given the displacement and elapsed time. When you’re in motion, the basic questions to ask are: Where are you? Where are you going? How fast are you getting there? The answers to these questions require that you specify your position, your displacement, and your average velocity—the terms we define in this section.
Explain the relationships between instantaneous velocity, average velocity, instantaneous speed, average speed, displacement, and time. Calculate velocity and speed given initial position, initial time, final position, and final time.
Find the average velocity of the car whose position is graphed in Figure 2.8.2. Strategy. The slope of a graph of x vs. t is average velocity, since slope equals rise over run. In this case, rise = change in position and run = change in time, so that. slope = Δx Δt = ˉv.
As written, it is set up to solve for average speed. But by multiplying each side of the equation by t and then dividing each side by vave, the variable t will be by itself on the left side of the equation. Substitution of known values of vave and d can be made in order to solve for t.
