A student pedaling a bicycle applies a net force of 400 N. The mass of the rider and the bicycle is 25 kg. What is the acceleration of the bicycle and the rider?
Answers
The acceleration is
Explanation:
We can answer this question by using Newton's second law, which states that the net force acting on an object is equal to the product between the mass of the object and its acceleration:
where
F is the force
m is the mass
a is the acceleration
In this problem, we have
m = 25 kg is the mass of the rider+bicycle
F = 400 N is the force
Solving for a, we find the acceleration:
Learn more about Newton's second law:
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Answer:
The acceleration is
Explanation:
We can answer this question by using Newton's second law, which states that the net force acting on an object is equal to the product between the mass of the object and its acceleration:
where
F is the force
m is the mass
a is the acceleration
In this problem, we have
m = 25 kg is the mass of the rider+bicycle
F = 400 N is the force
Solving for a, we find the acceleration:
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How much time is needed for a car to accelerate from 8.0 m/s to speed of 22 m/s if the acceleration is 3.0 m/s^2?
281 Hz
322 Hz
Answers
Answer:
322 Hz
Explanation:
v = speed of train approaching the railroad crossing = 80 km/h = 80 x 1000/3600 m/s = 22.22 m/s
V = speed of sound of the horn of train = 331.5 m/s
f = actual frequency of the sound from the horn = 300.0 Hz
f' = observed frequency of the horn
Using Doppler's effect, observed frequency is given as
f' = V f/(V - v)
inserting the values
f' = (331.5) (300.0)/(331.5 - 22.22)
f' = 322 Hz
h
Answers
Answer: the correct answer is option d.
Explanation:
Validity is concerned with the extent to which differences in scores reflect true differences in the characteristic.
Answer:
d. concerned with the extent to which differences in scores reflect true differences in the characteristic.
Explanation:
Validity is the level of accuracy of a measurement under research or test. A measurement is said to be valid if its result is closely related to real world values. Validity in research shows how sound one's research is. In data it means getting a true representation of the data a researcher is claiming to measure. To measure validity, the measurement must have internal consistency and good test-retest reliability.
Types of validity.
Validity can be content, construct, face and criterion.
Answers
Answer:
The total velocity of the ball will be 14.14 m/s.
Explanation:
Horizontal Velocity component = 10 m/s
Vertical Velocity component = -10 m/s
Total velocity of the ball will be found from the following equation:
(Total velocity) ^2 = (Horizontal Velocity) ^2 + (Vertical Velocity) ^2
Total Velocity ^2 = 10^2 + (-10)^2
Total Velocity^2 = 100 + 100
Total Velocity =
Total Velocity = 14.14 m/s
Answers
Mass of the asteroid = 1 x 10⁹ kg
Separation distance = 3 x 10⁶ m (between the Earth's center and the asteroid's center)
Gravitational force between two masses =
(6.67 x 10⁻¹¹ nt-m²/kg²) · m₁ · m₂ / (distance)²
= (6.67 x 10⁻¹¹ nt-m²/kg²) · (5.972 x 10²⁴ kg) · (1 x 10⁹ kg) / (3 x 10⁶ m)²
= (6.67 · 5.972 / 9) x 10¹⁰ · (nt · m² · kg · kg / kg² · m²)
= 13.28 x 10¹⁰ newtons
= 132.8 Giga-newtons .
(about 14,926,763 tons)
about the size of a pen
B.
about the size of a virus or a large molecule
C.
about the size of an amoeba
D.
smaller than an atom
E.
about the size of a football field
Answers
Answer:
this is the correct answer
Explanation:
Answer:
sorry about the other person but its b
Explanation:
transverse waves
longitudinal waves
circular waves
Answers
Circular is correct.