The distance traveled by the student's boxcar that starts from rest and reaches an acceleration and velocity of 13.1 m/s² and 24.5 m/s, respectively, is 22.9 meters.
We can find the distance traveled by the boxcar with the following kinematic equation:
Where:
: is the final velocity = 24.5 m/s
: is the initial velocity = 0 (it starts from rest)
a: is the acceleration = 13.1 m/s²
d: is the distance =?
By solving the above equation for <em>d</em>, we have:
Therefore, the boxcar will travel 22.9 meters.
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Answer:
option (c)
Explanation:
According to the doppler's effect, the frequency of sound decreases.
If there is a relative motion between the source and the observer, the frequency of sound changes apparently.
the formula of the doppler effect is given by
where, f is the real frequency, v be the speed of sound, vo be the speed of the observer, here, the bus is the observer.
So, the value of f' < f
Explanation:
Speed = 10 and miles = 5
(a) Speed + 12 – miles * 2
10 + 12 - 5 × 2
= 12
(b) speed + miles × 3
10 + 5 × 3
= 25
(c) (speed + miles) × 3
(10 + 5) × 3
= 45
(d) speed + speed × miles + miles
10 + 10 × 5 + 5
= 65
(e) (10 – speed) + miles / miles
(10 - 10) + 5/5
= 1
Therefore, this is the required solution.
Answer:
Kinetic Energy
Explanation:
Kinetic energy is moving energy
Answer:
Like all the planets in our solar system, Earth and Mars orbit the sun. But Earth is closer to the sun, and therefore races along its orbit more quickly. Earth makes two trips around the sun in about the same amount of time that Mars takes to make one trip.