Answer:
It is explained in the explanation section
Explanation:
When the lift starts going downwards, it will start accelerating downwards. After a while, it will start moving with a constant velocity.
Constant velocity means that acceleration is zero and so the man will not feel any weight loss.
Now, Once the lift achieves constant velocity the acceleration is zero hence he will not experience any weight loss.
However, when the lift is in uniform motion, the lift and the man will fall down with an acceleration(a) that is less than that due to gravity(g) . Thus, the man will feel an apparent weight F which is not equal to zero.
Answer:
33.516 kJ
Explanation:
Potential energy is given by:
PE = mgh
Where m is the mass, g is acceleration due to gravity, and h is the height. In this case:
PE = 38kg x 9.8m/s^2 x 90m = 33516 kg m^2/s^2 = 33516 J = 33.516 kJ
Answer:
It consists of a bulb containing mercury attached to a glass tube of narrow diameter; the volume of mercury in the tube is much less than the volume in the bulb. ... The space above the mercury may be filled with nitrogen gas or it may be at less than atmospheric pressure, a partial vacuum.
Explanation:
Answer:
4.6091 meters
Explanation:
In this problem, to have equilibrium in the seesaw, we need the torque from one child to compensate the torque from the other child.
The torque is calculated by making the product of the mass and the distance to the pivot point.
So, the torque generated by the first child (T1) is equal to:
T1 = m1 * d1 = 39 * 2.6 = 101.4 Nm
To make equilibrium, we need the second child to generate the same torque (T2), so:
T2 = m2 * d2 = 22 * d2 = 101.4
d2 = 101.4 / 22 = 4.6091 m
The second child need to be at 4.6091 meters from the pivot point to be in equilibrium.
