Physics, 13.11.2019 18:31 maritsaledesma

Two spheres, a and b, are simultaneously projected horizontally from the top of a tower. sphere a has a horizontal speed of 40.0 meters per second and sphere b has a horizontal speed of 20.0 meters per second. which statement best describes the time required for the spheres to reach the ground and the horizontal distance they travel? [neglect friction and assume the ground is level.]

sphere a hits the ground before sphere b, and sphere a lands twice as far as sphere b from the base of the tower.
both spheres hit the ground at the same time and at the same distance from the base of the tower.
both spheres hit the ground at the same time, but sphere a lands twice as far as sphere b from the base of the tower.
both spheres hit the ground at the same time, but sphere b lands twice as far as sphere a from the base of the tower.

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Answer from: quoia89

Both spheres hit the ground at the same time and at the same distance from the base of the tower.

The given parameters;

horizontal speed of sphere A = 40 m/shorizontal speed of sphere B = 20 m/s

The time required for each sphere to reach the ground is calculated as;

$h = v_0_y + \frac{1}{2} gt^2\\\\$

where;

is the initial vertical velocity

Both spheres have zero initial vertical velocity

The time required for the two spheres to hit the ground is calculated as;

$h = 0 + \frac{1}{2} gt^2\\\\t = \sqrt{\frac{2h}{g} } \\\\t_A = \sqrt{\frac{2h}{g} } \\\\t_B = \sqrt{\frac{2h}{g} } \\\\t_A = t_B$

The time required for both spheres to reach the ground is the same and the distance traveled is the same.

Thus, we can conclude that, both spheres hit the ground at the same time and at the same distance from the base of the tower.

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Answer from: Jmarie08

Both spheres hit the ground at the same time, but sphere A lands twice as far as sphere B from the base of the tower.

Explanation:

Since both spheres are released from the same height, therefore, the displacement is the same to mean they hit the ground at the same time. Considering that the speed of ball A is double the speed of ball B, it implies that A will land twice as far as B from the base of the tower.

Answer from: Quest

Maybe c? sorry if im wrong
An object is located 5.0 cm from a convex lens. the lens focuses light at a distance of 10.0 cm. wha

Answer from: Quest

answer: the exterior temperature of commercial jet planes as they leave the stratosphere and return to the ground increases steadily.

explanation:

the lower most layer of atmosphere is troposphere which extends from 0 to 12 km above the surface of the earth. the temperature initially decreases as distance is increased from the earth's surface. commercial jets fly in lower part of the stratosphere. the stratosphere extends upto 50 km. the temperature in stratosphere starts rising again due to presence of ozone which traps the uv rays.

thus, when the planes leave the stratosphere and return to the ground, the exterior temperature increases steadily.

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Two spheres, a and b, are simultaneously projected horizontally from the top of a tower. sphere a ha...

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