Answer:
The torque on the board = 11.8 Nm in the anti-clockwise direction
Explanation:
Please find attached the explanation to the answer given.
Let us assume that rocket only runs in initial energy and not using its own to flying.
Also , let upward direction is +ve and downward direction is -ve .
Initial velocity , u = 58.8 m/s .
Acceleration due to gravity ,
.
Final velocity , v - = 0 m/s .
We know , by equation of motion .

Hence, this is the required solution .
Answer:
N = 148.10N
Explanation:
GIVEN
Weight =125 N
force = 35
angle =42°
since there is no vertical acceleration
from
free body diagram


It would be 7 M 4 m x 2 m equals 8 M - 1 =7
Answer:
Δu=1300kJ/kg
Explanation:
Energy at the initial state

Is saturated vapor at initial pressure we have

Process 2-3 is a constant volume process

The overall in internal energy
Δu=u₁-u₃
We replace the values in equation
Δu=u₁-u₃

Δu=1300kJ/kg