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  1. Force from angle and magnitude

    Enunciado:  Determine the analytic expression of a force knowing that it forms an 120º angle on X – axis and it has a 5 N magnitude. Español Idioma Inglés Solución:  Data Angle with x axis  α = 120º Magnitude of the force  F = 5N Previous considerations O ...

  2. Concurrent or parallel forces?

    Enunciado:  Determine if they are concurrent or non concurrent forces (parallel). Español Idioma Inglés Solución:  ...

  3. Massive force

    Enunciado:  If the following forces act on a body: F → 1 =- 10 · i → + 10 · j →   ⋮     F → 2 = 4 · i →- 3 · j →   ⋮   F → 3   = 5 · i →-   j →   ⋮   F → 4   =   i →  -   j → Find out a force whose effect is equal to exert the 4 forces proposed. Español I ...

  4. Adittion of forces on the same direction

    Enunciado:  Two friends, a stocky one and a slim one, push a coach on the same direction. The first one exert a force of 11 N and the second one a force of 7 N. What is the resultant force? Español Idioma Inglés Solución:  Info F 1 = 11 N F 2 = 7 N F R =? ...

  5. Addition of forces on opposite directions

    Enunciado:  A boy and a girl tight two cords to a ring and play to find out who is stronger. The boy grab one of the cords and exert a force of 11 N, the girl applies 13 N at the same time. If both pull the cords on different directions... Who will win? E ...

  6. Linear Momentum

    Enunciado:  On a given instant of time, a rocket has a velocity of   v → = 12   ·   i →  -   7   ·   j →   m / s. Knowing that its mass is 2kg. What is the momentum on that instant? Español Idioma Inglés Solución:  Data v → = 12   ·   i →  -   7   ·   j → ...

  7. Linear Momentum of several particles

    Enunciado:  Two pool balls have the following velocity: Knowing that m 1 = 170 g y m 2 = 156 g, calculate the system´s linear momentum formed by both balls. Español Idioma Inglés Solución:  Data Mass of the first ball: m 1 = 170 g = 0.17 kg Value (magnitu ...

  8. Force and trajectory

    Enunciado:  If the equation of trajectory of a body is r → = t 2 i →- 5   t   j →  -   2 t 2   ·   k →  m, What is the force that makes it move if its mass is 4kg? Español Idioma Inglés Solución:  Data Mass m = 4 kg Equation of position: r → = t 2 i →- 5 ...

  9. Newton´s third law

    Enunciado:  Can you say what does a ball on a table interact with and where the forces are exerted at each interaction? Español Idioma Inglés Solución:  On one hand, the ball interacts by contact with the table, but it does also at distance with the ball, ...

  10. Impulse

    Enunciado:  A 1kg body is subjected to a single force F → =- 6   · i →   + 8 · j →   N  for 5s. If we know that its initial velocity is v o → = 15   · i →  - 10 · j →   N. Calculate: a)Impulse b)Linear momentum before and after the force is exerted. Españ ...

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