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monitta
3 years ago
9

A ball is thrown at 60 degrees and lands in 18.5 seconds what is the velocity of the ball at the start

Physics
1 answer:
n200080 [17]3 years ago
3 0

Answer:

the initial velocity of the ball is 104.67 m/s.

Explanation:

Given;

angle of projection, θ = 60⁰

time of flight, T = 18.5 s

let the initial velocity of the ball, = u

The time of flight is given as;

T = \frac{2u\times sin(\theta)}{g} \\\\2u\times sin(\theta) = Tg\\\\u = \frac{Tg}{2\times sin(\theta)} \\\\u = \frac{18.5 \times 9.8}{2\times sin(60^0)} \\\\u = 104.67 \ m/s

Therefore, the initial velocity of the ball is 104.67 m/s.

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2 years ago
A mass attached to a spring vibrates back and forth. At maximum displacement, the spring force and the
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Velocity of the mass reaches zero

EXPLANATION

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10 months ago
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3 years ago
An example of acceleration
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A coin with a diameter 3.00 cm rolls up a 30.0 inclined plane. The coin starts out with an initial angular speed of 60.0 rad/s
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This question is in complete.The question is

A coin with a diameter 3.00 cm rolls up a 30.0° inclined plane. The coin starts out with an initial angular speed of 60.0 rad/s and rolls in a straight line without slipping. If the moment of inertia of the coin is(1/2) MR² , how far will the coin roll up the inclined plane (length along the ramp)? Hint: Conservation of mechanical energy.

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distance=0.124 m

Explanation:

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3 years ago
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