The speed of the train after an additional 5 s has elapsed is 9.45 m/s
<h3>What is acceleration? </h3>
This is defined as the rate of change of velocity which time. It is expressed as
a = (v – u) / t
Where
- a is the acceleration
- v is the final velocity
- u is the initial velocity
- t is the time
<h3>How to determine the acceleration in 5.4 s</h3>
- Initial velocity (u) = 0 m/s
- Final velocity (v) = 4.9 m/s
- Time (t) = 5.4 s
- Acceleration (a) =?
a = (v – u) / t
a = (4.9 – 0) / 5.4
a = 4.9 / 5.4
a = 0.91 m/s²
<h3>How to determine the final velocity after 5 s</h3>
- Initial velocity (u) = 4.9 m/s
- Acceleration (a) = 0.91 m/s²
- Time (t) = 5 s
- Final velocity (v) = ?
a = (v – u) / t
0.91 = (v – 4.9) / 5
Cross multiply
v – 4.9 = 0.91 × 5
v – 4.9 = 4.55
Collect like terms
v = 4.55 + 4.9
v = 9.45 m/s
Learn more about acceleration:
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Answer:
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Explanation:
Hey you said this one would give 100 points.
It transfers energy through the source of the sound. Your ear detects sound waves when vibrating air particles cause your ear drum to vibrate
<span>conservation of momentum
mass(ball) × speed(ball) = mass(cannon) × speed(cannon)
(8.3 kg) × (187.9 m/s) = (949.3 kg) × v
1.64 m/s = v
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