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Why does the horizontal component of the speed not change values?
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A projectile is thrown with an initial velocity which has a horizontal component of 4 m s What will be its horizontal speed after 3s?
A projectile that is thrown with an initial velocity,that has a horizontal component of 4 m/s, its horizontal speed after 3s will still be 4m/s.
How is the horizontal component of velocity for a projectile affected by the vertical component?
The horizontal component of velocity for a projectile is not affected by the vertical component at all. Horizontal component is measured as xcos(theta) Vertical component is measured as xsin(theta) Whereas theta is the angle, and x is the magnitude, or initial speed.
Why does a force of gravity has no effect on horizontal component of velocity?
The force of gravity points towards the center of the earth ... the direction we call "down". The force has no horizontal component, so it can't have any effect on horizontal speed.
At what point in its trajectory does a batted baseball have its minimum speed?
Minimum speed occurs at the top, which is the same as the horizontal component of velocity anywhere along the path.
How can you change only one component of the velocity without changing the speed?
Reverse the direction of the component.
A projectile is thrown with an initial velocity which has a horizontal component of 4 m s What will be its horizontal speed after 3s?
A projectile that is thrown with an initial velocity,that has a horizontal component of 4 m/s, its horizontal speed after 3s will still be 4m/s.
How is the horizontal component of velocity for a projectile affected by the vertical component?
The horizontal component of velocity for a projectile is not affected by the vertical component at all. Horizontal component is measured as xcos(theta) Vertical component is measured as xsin(theta) Whereas theta is the angle, and x is the magnitude, or initial speed.
Why does a force of gravity has no effect on horizontal component of velocity?
The force of gravity points towards the center of the earth ... the direction we call "down". The force has no horizontal component, so it can't have any effect on horizontal speed.
On a speed-graph a horizontal line shows the change in speed is what?
Constant speedThe graph you described is a speed-time plot. If the line is horizontal, that indicates no change in speed over time. In other words, there is no acceleration (acceleration is zero), since there is no change in speed.
At what point in its trajectory does a batted baseball have its minimum speed?
Minimum speed occurs at the top, which is the same as the horizontal component of velocity anywhere along the path.
If a graph shows time on the horizontal axis and speed on the vertical axis a straight horizontal line across the graph would indicate what?
The graph you described is a speed-time plot. If the line is horizontal, that indicates no change in speed over time. In other words, there is no acceleration (acceleration is zero), since there is no change in speed.
How can you change only one component of the velocity without changing the speed?
Reverse the direction of the component.
What is the steepness of a line graph equal to its vertical change divided by its horizontal change is referred to as the?
Speed
How can you throw a projectile so that it has nonzero speed at the top of trajectory?
If the projectile's velocity has a horizontal component - in other words, it doesn't go straight up - then its speed will never be zero.
Which is the total velocity of a projectile at maximum height?
It depends. If the projectile goes straight up and straight down, its velocity will be zero at the top. If the projectile is a baseball about halfway between the pitcher and the bat, its velocity might be 150 km/h.
Does a horizontal line on a distance time graph show constant speed?
No. It shows zero speed. Velocity is distance/unit time. The slope of the line shows change in distance / change in time. Since distance never changes as time changes, the change in distance is zero. Alternatively, the slope of a horizontal line is zero. If zero speed is considered "constant", then yes, it does show constant speed but the speed is zero.
In the absence of air friction does the horizontal component of a projectile's velocity change as the projectile moves is this True False?
A projectile will travel on a straight line unless external forces act upon it. Gravity will pull the projectile downward, i.e. affect its vertical velocity component. This is why the projectile will decelerate upwards, reach a maximum elevation, and accelerate back down to earth. The force vector of air resistance points in the opposite direction of motion, slowing the projectile down. For example, If the projectile is going forward and up, air resistance is pushing it backwards (horizontal component) and down (vertical component). Without air resistance, there is no external force acting upon the horizontal velocity component and the projectiles ground speed will stay constant as it gains altitude and falls back down to earth.
