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3 years ago

If a ball is thrown horizontally with a speed of 65 mph, how far will it fall while traveling 90 ft of horizontal distance?

Physics

1 answer:

kow [346]3 years ago

3 0

Answer:

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Explanation:

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S ship maneuvers to within 2.50x10^3 m of an islands 1.80x10^3 m high mountain peak and fires a projectile at an enemy ship 6.10

lilavasa [31]

velocity of the projectile is given as

$v = 2.50 \times 10^3 m/s$

now the angle is given as 75 degree

so here we will have

$v_x = 2.50 \times 10^3 cos75 = 0.65 \times 10^3 m/s$

$v_y = 2.50 \times 10^3 sin75 = 2.4 \times 10^3 m/s$

now the time taken to reach the peak is given as

$t = \frac{x}{v_x}$

$t = \frac{2.50 \times 10^3}{0.65 \times 10^3} = 3.86 s$

now the height moved by the projectile in same time is given as

$y = v_y t + \frac{1}{2}at^2$

now we have

$y = (2.4 \times 10^3)(3.86) - \frac{1}{2}(9.81)(3.86)^2$

$y = 9.2 \times 10^3 m$

so distance between the peak and projectile is given as

$d = 9.2 \times 10^3 - 1.80 \times 10^3 = 7.4 \times 10^3 m$

5 0

3 years ago

In a simple electric generator, a conducting loop of wire is placed in a magnetic field. The loop of wire is then rotated. Why i

kaheart [24]

Explanation:

If a coil of wire is placed in a magnetic field and rotated, an alternating (sinusoidal) current is induced. As it rotates, sometimes it is cutting through lots of magnetic flux, and so lots of current is

induced.

At other times, it is moving parallel to

the flux, and so no flux is cut, and no current is induced. In between, some current is induced. This creates an alternating current. Either end of the coil can be connected to wires outside of the generator in order to use the current elsewhere. This would be fine for the

first few rotations, but after this, the wires would get tangled up and the generator would be useless. To avoid this, we use a commutator. In an AC generator, this is a pair of rotating conducting 'slip rings' attached to either end of the coil. Carbon brushes bring these into contact with the outside world.

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3 years ago

A man drops a baseball off of the top of the Empire State Building. If the action force is the Earth pulling on the ball, then w

stepladder [879]

Reaction force is the ball pulling up on the Earth. Every action has an equal and opposite reaction, so when the Earth pulls on the baseball, the baseball pulls back on the Earth with equal force

7 0

3 years ago

Read 2 more answers

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Veseljchak [2.6K]

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7 0

3 years ago

Runner 1 has a velocity of 10 m/s west. Runner 2 has a velocity of 7 m/s east. From the frame of reference of runner 2, what is

Vsevolod [243]

Answer:

Explanation:

Runner 1 has velocity = 10 m/s west

runner 2 has velocity = 7 m/s east

From the frame of reference of runner 2, we can imagine runner 2 as standing still, and runner 1 moving away from him, towards the west with their combined velocity of

velocity = 10 m/s + 7 m/s = <em>17 m/s west</em>

5 0

3 years ago