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Hitman42 [59]
3 years ago
12

Câu 1. Trường hợp nào dưới đây không phải là vật sáng?

Physics
1 answer:
Marianna [84]3 years ago
5 0

Answer:

A

Explanation:

A. The pencil is on the table in broad daylight

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You and your best friend are bored on a saturday afternoon and decide to measure the impulse acting on a basketball when it boun
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Answer:

v = √(2gh)

Assuming g = 9.81m/s^2

v = √(19.62h)

Explanation:

Let v represent the speed of the ball just before it collide with the ground.

Applying the equation of motion;

v^2 = u^2 + 2as

Where;

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s = distance covered = h

So, substituting the values;

v^2 = 0^2 + 2gh

v^2 = 2gh

v = √(2gh)

Assuming g = 9.81m/s^2

v = √(19.62h)

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1. I drop a penny from the top of the tower at the front of Fort Collins High School and it takes 1.85 seconds to hit the ground
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You have three known variables:

Acceleration - 9.8m/s^2
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