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Conservation of linear momentum principle

Enunciado: A competitor shoots a plate by using a rifle of 2,5 Kg on a skeet shooting competition. Knowing that the ball is 23 g and it is shot horizontally at 350 m/s, what is the recoil of the rifle? Español Idioma Inglés Solución: Data mass of the ri ...

Acceleration from forces

Enunciado: The following forces act on a body: F → a = i → + j → N ; F → b = j → + k → N ; F → c = i → + k → N What is the acceleration of the body if its mass is 2kg? Español Idioma Inglés Solución: Data Mass of the body: m = 2 kg Force ...

Relationship between masses based on Newton´s second law

Enunciado: Two bodies have acceleration 6 m/s 2 y 9 m/s 2 respectively, if they are under the same force. What is the relationship between masses? Español Idioma Inglés Solución: Data Acceleration of the first body a 1 = 6 m/s 2 Acceleration of the se ...

Traveled distance by a body from force

Enunciado: A 6kg body initially on repose experiences a force of 10 N for 4 seconds. What distance does it travel? Español Idioma Inglés Solución: Data Mass of the body m = 6 kg Force the body is subdued F = 10 N Time during the force acts t = 4 s Pr ...

Newton´s second law and the nail in the wall

Enunciado: Pablito is nailing a nail into the wall by using a 2kg hammer of mass. The impact speed is 6m/s. What is the resistance force of the wood if the nail is 5mm depth? Español Idioma Inglés Solución: Data Mass of the hammer m hammer = 2 kg Init ...

Several forces´s impulse

Enunciado: A 35 kg body at rest is subjected to the following forces for 3 minutes: F → 1 = 125 · i → + 200 · j → ; F → 2 =- 400 · i → ; F → 3 =- 150 · i → + 180 · j → If N is the measure given, calculate: 1. Resultant force 2. Impulse 3 ...

Impulse from linear momentum variation

Enunciado: A 50 g rubber ball is hit by a racket. Ball´s velocity before the hit is v → i =- 20 · i →- 20 j → m / s,after the hit, the velocity is v → f = 15 · i → + 20 j → m / s. Determine the impulse exerted by the racket on the ball and the value ...

Force from impulse

Enunciado: Alice has had a traffic accident when she was driving at 90 km/h. Thanks she was wearing the seatbelt she survived. Can you say what average force has the seatbelt exerted if the impact last 0.05 s and Alice weights 55 kg? Español Idioma Inglé ...

Interpretation of impulse in graphs

Enunciado: The following figure represents 3 different forces acting on 3 bodies of equal mass on identical conditions. Knowing that the 3 of them start on rest position, what of them will gain more final speed? Español Idioma Inglés Solución: Data The ...

Collision velocity and momentum conservation

Enunciado: A 3 Kg ball is moving towards left at 6 m/s. It collides with a 5 Kg ball moving towards right at 2 m/s. After the collision the second ball went through the left at 3 m/s. Calculate the velocity of the first ball after the crash. Español Idio ...