Answer:
The answer is 100J.
Explanation:
In classical mechanics, kinetic energy (KE) is equal to half of an object's mass (1/2*m) multiplied by the velocity squared. In this question, the mass is equals to 50kg and the velocity is 2m/s
Now,
25kg×4m/s^2 = 100kgm/s^2 or 100J
Human lack chlorophyll, which is the function that collects energy from the Sun to conduct photosynthesis.
Answer:
5.5 rad/s
Explanation:
The friction between the coin and the turntable provides the centripetal force that keeps the coin in circular motion. Therefore, we can write:
![\mu mg = m\omega^2 r](https://tex.z-dn.net/?f=%5Cmu%20mg%20%3D%20m%5Comega%5E2%20r)
where
is the coefficient of friction
m is the mass of the coin
is the acceleration of gravity
is the angular speed
r is the distance of the coin from the centre of rotation
In this problem,
r = 11.0 cm = 0.11 m
The coin starts to slip when the centripetal force becomes larger than the maximum frictional force:
![m\omega^2 r > \mu m g](https://tex.z-dn.net/?f=m%5Comega%5E2%20r%20%3E%20%5Cmu%20m%20g)
Solving for
, we find the angular speed at which this happens:
![\omega = \sqrt{\frac{\mu g}{r}}=\sqrt{\frac{(0.340)(9.8)}{0.11}}=5.5 rad/s](https://tex.z-dn.net/?f=%5Comega%20%3D%20%5Csqrt%7B%5Cfrac%7B%5Cmu%20g%7D%7Br%7D%7D%3D%5Csqrt%7B%5Cfrac%7B%280.340%29%289.8%29%7D%7B0.11%7D%7D%3D5.5%20rad%2Fs)
<h3>Answer : </h3><h3 /><h3>A ) The larger gear can be moved by applying a relatively small force on the smaller gear.</h3>
<h3>B )
The force applied on the smaller gear is transmitted without any loss to the larger gear .</h3><h3 /><h3>
C ) the direction of motion can be changed without changing the direction of the applied force .</h3>
D ) the system would continue to move without any further, after and initial force has set in motion.