Answer:
Explanation:
Tension T in the rope will create torque in solid cylinder ( axle ). If α be angular acceleration
T R = 1/2 M R²α ( M is mass and R is radius of cylinder )
= 1/2 M R² x a / R ( a is linear acceleration )
T = Ma / 2
For downward motion of the bucket
mg - T = m a ( m is mass and a is linear acceleration of bucket downwards )
mg - Ma / 2 = ma
a = mg / ( M /2 + m )
Substituting the values
a = 14.7 x 9.8 / ( 5.8+ 14.7 )
= 7 m / s²
A )
T = Ma / 2
= 5.8 x 7
= 40.6 N
B ) v² = u² + 2 a h
= 2 x 7 x 10.3
v = 12 m /s
C )
v = u + a t
12 = 0 + 7 t
t = 1.7 s
A cyclist can increase the speed of their bike in various ways such as, changing gears, positioning themselves properly, increase the pedalling rate
<h3>
Ways in which a cyclist can increase the speed of a bicycle</h3>
Bicycle riders could accelerate/ increase their speed in various ways
- By Changing the gears and by doing so increasing the speed
- By Positioning themselves in a streamlined manner, this is so that they become aerodynamic hence they cut across airflow.
- By increase the rate at which they are pedalling the bicycle.
Learn more about increasing bicycle speed here:
brainly.com/question/13749553
<h2>
Oxygen is moving at 483.63 m/s</h2>
Explanation:
Kinetic energy = 0.5 x Mass x Velocity²
Kinetic energy = 6.21 x 10⁻²¹ J
Mass = 5.31 x 10⁻²⁶ kg
Substituting
Kinetic energy = 0.5 x Mass x Velocity²
6.21 x 10⁻²¹ = 0.5 x 5.31 x 10⁻²⁶ x Velocity²
Velocity² = 2.34 x 10⁵
Velocity = 483.63 m/s
Oxygen is moving at 483.63 m/s
The mass of the man would remain the same…
His weight would change. Assuming the man’s weight on earth is 60N.
Since weight is a force, according to Newton’s second law, F = ma ( m = mass, a = acceleration due to gravity) First lets find the mass of the man, as it is required to find his weight on the moon.
F=ma[taking a of earth as10m/s
2
]
60=m.10[divide10onbothsides]
m=
10
60
= 6 Kg
Acceleration due to gravity on the moon is83%less than the acceleration due to gravity on earth(1.622m/s
2
).
F=ma
F=6.1.622=9.732 N
So a person weighting 60N on earth would approximately weight around 10Non the moon.
Assuming all three bulbs are connected properly with their conductivity creating a circuit, if one is unscrewed all bulbs would shut off causing zero emission of light to be displaced. Meaning answer D would be the closest to the right response.
Hope this helps! :)
