A simple high school physics problem! Ask for a high school physics problem!

The answer is 5 times the root number 2 Newton.

Process Because of equilibrium, a force other than the force of 5n of rotation can be regarded as a force of magnitude 5n, and the direction is opposite to the force of rotation, and after rotation, it becomes a combination of two forces of magnitude of 5n perpendicular to each other, and then the force is combined.

The answer should be 5 times the root 2

Regardless of the number of actions, only the force of the pair of 5 N is out of balance, and one of them is rotated 90 degrees to form: two forces of 5N act at an angle of 90 degrees on the point of action of the object, and the force of action is 50 under the root number, that is, 5 times the root number 2

Five-fold root number two.

The rest of the li is equivalent to the force opposite to the force of the original five oxen, the force of the original five oxen is turned ninety degrees, and the two five oxen forces are at right angles.

First draw a sketch of the balance of three forces, and find that if the force of 5n is removed, then the resultant force of the remaining two forces is equal to the force of 5n, and the resultant force is made and then combined with the force rotated by 90°, then the magnitude of the total resultant force is five times the root number two.

The rest of the resultant forces are balanced, and this pair of forces is also balanced, and the angle is 180, and one of the angles is 90 degrees after turning 90 degrees, so the resultant force can be obtained by the Pythagorean theorem.

The other forces are unchanged means that the resultant force of the other forces is in the opposite direction to changing the magnitude of the force.

When this force is rotated 90 degrees, the angle of the resultant force of the other forces is 90 degrees.

So the total resultant force is the root number 2 f (f is the rotational force).

Assuming that the original direction of the force of 5n is upward, then after rotation, it becomes the resultant force of a force of 5n downward and a force of 5n (the direction can be left or right) with a rotation of 90 degrees!

The square of 5 plus the square of 5 and then the square is 5 times the root number 2.

Five times the root number two.

The combined force of the other forces is 5 N.

After rotating the force, the angle between the two forces is ninety degrees.

The answer can be solved by the knowledge of right triangles.

10 24m, supercluster (astronomical).

10 12m, the diameter of the solar system.

10 -5m, bacteria.

10 -15m, nucleus.

Thanks, physics friends.

The earliest limit for the second object to throw is to land at the same time as the first object, i.e. the minimum time interval:

t1=4v/g-2v/g=2v/g；

The latest limit for the second object to be thrown is that it must be thrown before the first object hits the ground, i.e. the maximum time interval:

t2=4v/g；

So the time interval δt satisfies: 2 V g< δt < 4 v g

The total motion time of an object with an initial velocity of 2v is 4v g

The total motion time of the object with initial velocity v is 2v g

Let the object with a large muzzle velocity move time t before the object with a small muzzle velocity, then.

t + total motion time of the object with initial velocity v = total motion time of the object with initial velocity 2v before it is possible to meet.

t>=2v/g

and t<=4v g

The total displacement is equal, and you can use this equation I don't have a solution, you solve it, and there should be an answer, and I think the initial velocity should be a concrete number, hehe.

Don't you think that you can collide by throwing the first object and then throwing the second object?

The time of the initial velocity 2v t=4v g, the time of the initial velocity v t=2v g, if two objects want to collide in the air, the time should meet 2v g t 4v g

Because the person takes a step to the right, the angle of the rope relative to the ground becomes smaller, so that the upward component t1 of the rope becomes smaller, and the component t2 to the left becomes larger. (n for.) The support of the ground for people).

Because n = g-t1 and t1 becomes smaller, n becomes larger, that is, the pressure on the ground increases. Therefore, choose C.

And because f (friction) = t2, and t2 becomes larger, so f becomes larger. Therefore, choose B.

Perfect answer, take mine!Thank you.

For the analysis of human force, there are 2 forces in the vertical direction, gravity mg and support force n, only friction f in the horizontal direction, and the pulling force f of the rope. Let the angle between the rope and the vertical direction be , then the orthogonal decomposition obtains: horizontal direction f=fsin;Vertical direction n+fcos = mg.

Since f is equal to the gravitational force g of the heavy object, it is unchanged;After the person takes a step to the right, it becomes bigger, so f becomes bigger, and n becomes bigger. The answer is bc

The upward component of the rope does not change, so the pressure remains the same, and the angle between the rope and the ground decreases, so the horizontal component increases and the friction increases.