That would likely give more information here.) My question is which way does the first object move immediately after impact? With the given information I can't even tell which way object 1 is going to move initially after the collision: up or down? (I haven't tried a "brick wall" frame yet. This is probably why your method 's because the two answers are also going to be pretty much the same. You said that you got the same result as your teacher, but also that the masses of the two objects are almost equal. Generally when two unequal masses collide you can't expect the speeds to be equal. There are numbers in this problem but also, its irrelevant to my question. The two springs of modulus k are initially un-stretched. Neglect ALL FRICTION, and ASSUME block B is initially held in place by a hidden mechanism until the collision begins. Determine the maximum downward displacement h2 of block B. It then collides with the 0.4kg block B, the coefficient of restitution is e. Question: The 0.5 kg cylinder A is released from rest from the position shown and drops distrance h1. There is a picture that goes with the problem, but for my question I believe its irrelevant. My assumption gave me the same answer as my teacher. I ask this because my teacher found Vb by using coefficients of restitution. My question: Is it fair to assume that the velocity of Va = Vb, after impact? The weights are non-impulsive, since the difference in weight is small. Support Reactions - Equilibrium - Static equilibrium is achieved when the resultant force and resultant moment equals to zero.I was reworking a problem from class today, and made a simple assumption, in regards to the problem, that made this problem much easier.Rolling Resistance - Rolling friction and rolling resistance. Projectile Range - Calculate the range of a projectile - a motion in two dimensions.Kinetic Energy - Energy possessed by an object's motion is kinetic energy.Jet Propulsion - Calculate the propulsive discharge force or thrust induced by an incompressible jet flow.Impact Force - Impact forces acting on falling objects hitting the ground, cars crashing and similar cases.Formulas of Motion - Linear and Circular - Linear and angular (rotation) acceleration, velocity, speed and distance.Force Ratio - The force ratio is the load force versus the effort force. Flywheels - Kinetic Energy - The kinetic energy stored in flywheels - the moment of inertia.Speed and Time - Calculator and Chart - Velocity plotted in time used diagram. Conservation of Momentum - The momentum of a body is the product of its mass and velocity - recoil calculator.Car - Required Power and Torque - Power, torque, efficiency and wheel force acting on a car.Angular Motion - Power and Torque - Angular velocity and acceleration vs.Mechanics - Forces, acceleration, displacement, vectors, motion, momentum, energy of objects and more.Dynamics - Motion - velocity and acceleration, forces and torque.Then the velocity of the car after 10 s can be calculated as The impulse - or change in momentum - can be calculated I = impulse (N s) Example - resulting Velocity after an Acting ForceĪ force 1000 N is acting on a car with mass 1000 kg in 10 second. The impulse is equal to the change of momentum caused by the impulsive force and can be expressed as The product of the impulsive force and the time it acts is called the impulse. (1) can alternatively be expressed asĬhange in momentum is force times acting time.įorces that act for a very short time are called impulse forces. According to Newton's Second Law of Motion - force can be expressed asĭM = change of momentum (kg m/s, lb ft/s)Įq.
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