# find

1. ### How do I find the minimum force done by a person pushing a box when two coefficients?

The problem is as follows: A box of $320\,N$ is at rest over a horizontal terrain. The coefficients of friction between the box and the terrain are $0.36$ and $0.48$. A girl is pushing the box with her arms making an angle of $37^{\circ}$ with the horizontal. Find the magnitude of the minimum...
2. ### How do I find the work done by a force pulling a block from a pulley?

The problem is as follows: The diagram from below shows a block being pulled by a wire. The block's mass is $10\,kg$ and it moves horizontally from point $A$ to point $B$ due a constant force labeled $\vec{F}$ whose modulus is $40\,N$. Find the work done by the force $F$. The distance between...
3. ### Find integer solutions

Find integer solutions of system: x + y = z arctan x = arctan y + arctan z
4. ### How to find the work done by a tilted force on a block as it's pulled up an incline?

The problem is as follows: The figure from below shows a block which is pulled from point $A$ to point $B$ by a force $F=50\,N$ and a constant direction. Find the work in Joules that is made between points $A$ and $B$. (Hint: You may use the triangle $7-24-25$ for...
5. ### How do I find the horizontal distance of a block when it is sliding down an incline?

The problem is as follows: A body whose mass is $1\,kg$ is sliding over an incline of $5\,m$ in length. One of its sides has an elevation of $3\,m$ with respect of the floor. The other is resting in the floor. Find the horizontal distance which the body will travel before it stops. The...
6. ### How do I find the total acceleration in a pendulum?

The problem is as follows: The diagram from below shows a pendulum. It is known that the magnitude of the tension of the wire is five times of that the weight of the sphere which is attached to. Acording to this information indicate True or False to the following statements: I. The...
7. ### How do I find the spinning speed for a block when it is moving in circles?

The problem is as follows: The figure from below shows a block of mass $m$ and an incline. The frictional force is $20\,N$. Find the rotation speed in $\frac{m}{s}$ necessary such as the block begins to move upwards in the incline. The alternatives given in my book are...
8. ### How do I find the work done by the kinetic friction force when the surface is a curve

The problem is as follows: The diagram from below shows a boy of 30 kg of mass slides down a slide from a height of $5\,m$ starting from rest in point $A$. He reaches to point $B$ with a speed of $4\,\frac{m}{s}$. Find the work done by the frictional force in Joules. You may use...
9. ### How can I find the work on a block when it is pulled up in a curve?

The problem is as follows: The figure from below shows a force acting on block as it is pulled upwards in a curve from point $A$ to $B$. It is known that the block is pulled by a force which its modulus is $100\,N$. Find the work (in Joules) of such force between the points indicated...
10. ### How do I find the average speed when an airplane is flying in circles?

The problem is as follows: At an air exhibition a biplane is flying in circles as shown in the figure from below. It is known that type of motion of this airplane is a rotation with constant angular acceleration. The radius of the circle is $2\,m$. Using this information find the average speed...
11. ### period find problem

i was looking at shor's algorithm and had a bright idea, square the numbers rather than multiply by a specific base. this idea however doesn't seem to work. for example, the followng code: def gcd(p,q): if p == 0: return q else: return gcd(q%p,p) N= 97*79 per = 1...
12. ### How do I find the maximum value of a force to be applied to a body when is pulled?

The problem is as follows: The system shown in the figure from below is at rest. The masses for both objects are given as follows, $m_{B}= 3 m_{A}=6\,kg$, the coefficient of friction between the block $A$ and $B$ is $0.5$ and the friction is negligible between block $B$ and the floor. Using...
13. ### How do I find the minimum force to be applied to a block sliding in a incline?

The problem is as follows: The figure shows a block over an incline. Find the minimum force that must be applied to the block so that the body of mass $m=2\,kg$ such as that body moves with constant velocity upwards in the incline. It is known that the coefficient of friction between the...
14. ### How to find a force when a pair is given in a diagram with an acceleration?

The problem is as follows: A body of $5\,kg$ of mass is at rest when $x=0$. suddenly, two forces $\vec{F_{1}}$ and $\vec{F_{2}}$ act on the body applying on it an acceleration of $10\frac{m}{s^{2}}$ in magnitude. It is known that $F_{1}=70\,N$. Find the force $F_{2}$ in $N$. You may consider...
15. ### How do I find the maximum force when one block is held tight against a wall?

The problem is as follows: Two bodies are shown in the figure shown below. These are at rest. It is known that the coefficients of friction between the surfaces in contact are $0.5$ and $0.3$. Find the magnitude of the maximum force $\vec{F}$ in $N$ so that the bodies are at rest. The blocks...
16. ### How do I find the acceleration of a block sliding over an incline?

The problem is as follows: A block is sliding with a constant velocity over an incline. The angle of that incline is $\alpha$. What would be the acceleration of the block when the angle of the incline is $2\alpha$? (You may use $g=10\frac{m}{s^2}$).} The alternatives given on my book are as...
17. ### How do I find the reaction between two blocks when only one has friction?

The problem is as follows: The system is moving over a rough surface. It is known that only block $A$ is fritionless. Find the modulus of the reaction, in $N$ between the blocks $A$ and $B$. Consider that the coeficcient of kinetic friction between the floor and block $B$ is $0.5$ and the...
18. ### How do I find the maximum value of the force between two blocks?

The problem is as follows: In the figure from below there are two blocks, one over another. The system is at rest. The horizontal surface is frictionless and the coefficient of static friction is $0.45$ Find the maximum value of $F$ in $N$ such as the blocks will not slide between them. (You...
19. ### Find A B C D E in this equation

Find A B C D E in this equation CX epx(ixa)-DX exp(-ixe)=EK exp(ika) Note by moderator: the above seems mistyped, and there is no A or B in the equation.
20. ### How can I find the horizontal contact force between two circles?

The problem is as follows: The figure from below shows a rectangular object entirely flat which is placed over two circles of radius $R$. The superficial mass density of the object is $\sigma$ and the radius $R$ of each circle makes with both contact points an angle $\phi$ with the horizontal...