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Ber [7]
3 years ago
9

The trajectory of a projectile always ________________.

Physics
1 answer:
sattari [20]3 years ago
8 0

Answer:

c) curves downward, below the initial velocity vector

Explanation:

A projectile is usually launched from a height, where it is launched with an initial velocity. From that point the gravitational force begins to act on the projectile causing it to decay. As time passes, the projectile advances but its height decreases. So its trajectory is curved downward, below the initial velocity vector.

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A ball is thrown straight up from a bridge at a speed of 11.0 m/s. If it takes 5.5 seconds to hit the water below, what is the v
seropon [69]

Answer:

 v = 42.92 m/s

Explanation:

Given,

initial speed of the ball, v = 11 m/s

time taken to hit the ground = 5.5 m/s

velocity of the ball just before it hit the ground, v = ?

time taken by the ball to reach the maximum height

using equation of motion

 v = u + at

final velocity = 0 m/s  

 0 = 11 - 9.8 t

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time taken by the ball to reach the water from the maximum height

 t' - 5.5 -1.12 = 4.38 s

using equation of motion for the calculation of speed just before it hit the water.

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Velocity of the ball just before it reaches the water is equal to v = 42.92 m/s

3 0
3 years ago
What is providing the centripetal force in the following examples?
umka2103 [35]
A yo-yo swung in a circle.
8 0
3 years ago
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A stationary boat bobs up and down with a period of 2.4 s when it encounters the waves from a moving boat.
lapo4ka [179]
It seems like the question is asking for the frequency.
Given: 
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We know that the formula for frequency is:

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8 0
3 years ago
How much heat has to be added to 508 g of copper at 22.3°C to raise the temperature of the copper to 49.8°C? (The specific heat
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Answer:

Q = 5267J

Explanation:

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Q = (508g) * (0.377 J/g·°C) * (27.5C)

Q= 5266.69J

Approximately, Q = 5267J

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3 years ago
Cevab 2 anlatarak çözer misiniz​
Assoli18 [71]
Translate please, i’d be able to help better:)
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3 years ago
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