PhanthomJay said:Velocity and momentum are vectors, which means you have to take into account the direction of the velocities (plus or minus) before and after the collision. Your answer is not correct. If the force is negative, what does that imply?
um...12N toward the wall?PhanthomJay said:12 N for the average force is correct, but what is the direction of the 12 N force? You can choose any direction as negative, as long as you choose the opposite direction as positive. If you make the final velocity negative, then the initial velocity is positive. In which case,
0.1F = .15*(-3) - (.15*5)
F = - 12 N
How do you interpret the minus sign??
Impulse momentum theory is a physics principle that describes the relationship between the force applied to an object, the time it is applied for, and the resulting change in momentum of the object.
When a ball strikes a wall, the force of the impact and the time it takes for the impact to occur will determine the change in momentum of the ball. This change in momentum can be calculated using the impulse momentum equation, where impulse equals force multiplied by time.
The force of the impact can be affected by the velocity of the ball, the mass of the ball, and the material of the wall. The time of the impact can be affected by the elasticity of the ball and the wall, as well as any external forces acting on the ball.
Impulse momentum theory is used in various fields such as sports, engineering, and transportation. It helps in understanding the effects of forces on moving objects and can be used to design safer and more efficient structures and vehicles.
Impulse momentum theory assumes that the force is constant throughout the entire impact, which may not always be the case. It also does not account for rotational motion or external factors such as air resistance. Additionally, it is only applicable to situations where the mass of the object remains constant.