Answer:
Explanation:
let the ladder is of mass "m" and standing at an angle with the ground
So here by horizontal force balance we will have
by vertical force balance we have
now by torque balance about contact point on ground we will have
so we will have
now from first equation we have
Answer:
11.56521 m/s
Explanation:
= Area of first section =
= Area of second section =
= Velocity in first section = 1.9 m/s
= Velocity in second section
From the continuity equation we get
The speed of the river through the section of rapids is 11.56521 m/s
Answer:
18000 Bg
Explanation:
after 15 minutes = 36000/2
After 30 minutes = 36000/4
30 minutes × 2 = 1 hour
After 1 hour = 36000/4 × 2 = 18000 Bg
Answer:
Value of acceleration in each case is
Explanation:
According to newton's law :
...equation 1.
In the given case, Force by both the children - Friction force .
Putting value of F in equation 1.
Now, if friction force = 20 N.
Therefore,
Putting value of F and a in equation 1.
Hence , this is the required solution.