Why do you see colors when you look at reflected light from a cd
1 answer:
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Answer:
i) No, the spring scale does not read a different value
ii) The torque will read a different value, it will reduce
iii) The spring scale does not need to be measured at the center of mass location.
Explanation:
The torque caused by the gyroscope can be given by the relation,
r × f
The torque measured by the gyroscope varies directly with the distance, r.
A decrease in the distance r will also cause a decrease in the value of the torque measured. When the distance, r is reduced from 7.5 inches to 5 inches, the torque caused by the gyroscope's weight also reduces.
The weight of the gyroscope remains constant despite the reduction in the distance because the weight of the gyroscope is not a function of the distance from the gyroscope. Therefore, the spring scale will not read a different value.
Yes, the spring scale does not need to be measured from the center of mass location because the weight does not depend on the location of measurement. The reading of the sprig scale remains constant.
Explanation:
Mass of two soccer balls,
Initial speed of first ball,
Initial speed of second ball,
After the collision,
Final speed of the second ball,
(a) The momentum remains conserved. Using the conservation of momentum to find it as :
is the final speed of the first ball
(b) Let is the kinetic energy of the first ball before the collision. It is given by :
It is at rest, so, the kinetic energy of the first ball before the collision is 0.
(c) After the collision, the second ball comes to rest. So, the kinetic energy of the second ball after the collision is 0.
Hence, this is the required solution.