Yes, momentum, like velocity, has a direction, and is a vector. (even though it isn't mentioned very often in these high-school problems).
Its direction is the same as the direction of the velocity that it's made of.
But the statement is a bit sloppy . . . It's true that momentum has a direction just like velocity has. But neither of them involves "a force".
Velocity is a direction with a SPEED.
Momentum is a direction with a product of (mass) x (velocity).
You have to put the two statements so we can say it’s true or not
Answer:
2.56m
Explanation:
This is problem 4.47 from your textbook.
Find: Whether a batted baseball clears a fence, and by what amount it does or does not.
Given: The baseball’s initial launch height and angle, the range the baseball would have without the fence, the distance to the fence and its height.
Let the y axis run vertically and the x axis horizontally. Let the range the baseball would have without the fence be R=107 m, with the distance to the fence d=97.5m and its height hfence=7.32 m. The baseball is batted at an angle θ=45° at speed vi a height of hbat=1.22m above the ground.
Let the origin be at the position the ball leaves the bat. The height of the fence relative to the height of the bat is then
δh = hfence − hbat
What we really need to determine is the ball’s y coordinate at x = d. If y > δh, the ball clears the fence. We can use the range the baseball would have without the fence and the launch angle to find the ball’s speed, which will allow a complete calculation of the trajectory.
Relevant equations: We need only the equations for the range and trajectory of a projectile over level ground:
R = (vi*sin2θ)/g
For convenience sake and easy reading, I extracted the solution of your textbook for the remaining parts of the solution.
Hence, it is seen that the ball does clear the fence, by approximately 2.56 m
In contrast, extratropical cyclones have their strongest winds near the tropopause, which is about 8 miles above the surface. These differences are due to the tropical cyclone being “warm-core” in the troposphere, whereas extra-tropical cyclones are “warm-core” in the stratosphere and “cold-core” in the troposphere.
Infiltration
Explanation:
The component of the hydrologic cycle affected by impervious building such as concrete and asphalt is infiltration.
- Water infiltration is a major component of the hydrologic cycle.
- Concretes and other materials can prevent water from going down into the earth.
- This affects the ground water system in place.
- It leads to increase in surface run off and might cause inundation of an area.
- Infiltration is a very important component of water cycle.
- It takes water to plant root and recharges groundwater systems.
- Impervious structures takes this capability away.
learn more:
Biogeochemical cycle brainly.com/question/3509510
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