Answer:
In the order largest to smallest
Pc = Pb, Pa
Explanation:
Power = Energy expended/time
Pa = 2/2 = 1Watt
Pb = 10/5 = 2Watt
Pc = 2E-3/1E-3 = 2Watt
The answer is 388 800 sec
Answer:
The net force is 15 newtons
The direction is to the right
Explanation:
Hope this helps
Answer:
x = 0.974 L
Explanation:
given,
length of inclination of log = 30°
mass of log = 200 Kg
rock is located at = 0.6 L
L is the length of the log
mass of engineer = 53.5 Kg
let x be the distance from left at which log is horizontal.
For log to be horizontal system should be in equilibrium
∑ M = 0
mass of the log will be concentrated at the center
distance of rock from CM of log = 0.1 L
now,
∑ M = 0
![m_{log} g \times 0.1 L = m_{engineer} g \times (x - 0.6 L)](https://tex.z-dn.net/?f=m_%7Blog%7D%20g%20%5Ctimes%200.1%20L%20%3D%20m_%7Bengineer%7D%20g%20%5Ctimes%20%28x%20-%200.6%20L%29)
![200 \times 0.1 L = 53.5 \times (x - 0.6 L)](https://tex.z-dn.net/?f=200%20%5Ctimes%200.1%20L%20%3D%2053.5%20%5Ctimes%20%28x%20-%200.6%20L%29)
![0.374 L =x - 0.6 L](https://tex.z-dn.net/?f=0.374%20L%20%3Dx%20-%200.6%20L)
x = 0.974 L
hence, distance of the engineer from the left side is equal to x = 0.974 L