It’s 4. Definitely 4. 99% sure it’s 4.
Jogging side by side since the speed is equal and the direction is the same i.e same velocity
Answer:
I think its C sorry if it's wrong
<span>e=ca{\displaystyle e={\frac {c}{a}}}.</span>
Answer:
U² = 142.86 N
U¹ = 357.14 N
Explanation:
Taking summation of the moment about point A, we get the following equilibrium equation: (taking clockwise direction as positive)

where,
W = weight of boy = 500 N
U² = reaction ay B = ?
Therefore,

<u>U² = 142.86 N</u>
Now, taking summation of forces on the plank. Taking upward direction as positive, for equilibrium position:

<u>U¹ = 357.14 N</u>