Answer:
7 MW
Explanation:
mass of helicopter, m = 12 Mg = 12000
volume of water in bucket, V = 5 m³
diameter of blade, D = 14 m
density of water, d = 1000 kg/m³
density of air, d' = 1.23 kg/m³
The weight of water and the helicopter is balanced by the thrust produced by the rotor blade of the helicopter.
So, force
F = m x g + V x d x g
F = 12000 x 9.8 + 5 x 1000 x 9.8
F = 166600 N
Let initially the velocity of blade is v
v = 41.96 m/
Power of the helicopter, P = Force x velocity
P = 166600 x 41.96
P = 7 x 10^6 Watt
P = 7 MW
The lower the value of the coefficient of friction, the lower the resistance to sliding.
<u>Explanation:</u>
The coefficient of friction defines as directly proportionate with the resisting force, which is the frictional force. Hence, if there seems a decrease at coefficient of friction, then it is sure that the frictional force decreases.
We know that the frictional force on a body, is the product of coefficient of frictions and the normal forces acting on the body. Note that friction acts only, if a body is in contact, and it is of three types, static, kinetic and rolling.
Answer:
Consinder the first body
Consider the second body
The body of mass 4 kg had the greater potential energy than the body of 2 kg
Answer:
The discharge of the stream at this location is 40 cubic meters per second.
Explanation:
The discharge is the volume flow rate of the water in the stream. For this purpose we can use the following formula:
Discharge = Volume Flow Rate = (Cross-Sectional Area)(Velocity of Stream)
Volume Flow Rate = (Width of Stream)(Depth of Stream)(Velocity of Stream)
Volume Flow Rate = (4 meters)(2 meters)(5 meters per second)
<u>Volume Flow Rate = 40 cubic meters per second</u>
Therefore, the discharge of the stream at this location is found to be <u>40 cubic meters per second</u>
This result shows that 40 cubic meters volume of water passes or discharges through this point in a time of one second. Hence, this is called the volume flow rate or the discharge of the stream.
5.0j as we know that work is derived as force into displacement so 5*1=5si force will be 5.0j