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Relative Velocity of Rain Drops in a Moving Vehicle The problem involves analyzing the relative velocity of raindrops as observed from a moving vehicle during a rainstorm The original poster describes two scenarios: driving north at 25 m s while observing the rain at an angle of 38 degrees from the vertical, and driving south at the same speed while observing the rain falling straight down The goal is to determine the speed and angle of the
Escape Velocity Question: Why is the final kinetic energy = 0? The discussion revolves around the concept of escape velocity, specifically addressing why the final kinetic energy of an object is considered to be zero when it reaches an infinite distance from a gravitational body Participants explore the implications of this idea on the object's velocity and its interaction with gravity at large distances
Numerade Confusing speed with velocity, neglecting the directional component of velocity Overlooking that deceleration is still a form of acceleration (negative acceleration) Failing to correctly apply the vector nature of velocity and acceleration in problem-solving
Why a force perpendicular to the velocity doesnt change the magnitude? A participant points out that for a change in direction, the acceleration must remain perpendicular to the velocity at all times, particularly in circular motion It is noted that if the force is perpendicular to the velocity, the work done is zero, leading to constant kinetic energy and thus constant speed
Finding displacement with coefficient of friction, mass and velocity The problem involves a physics scenario where a student slides a textbook with a known mass and initial velocity across a surface with friction The objective is to determine the distance the book travels before coming to a stop due to the frictional force acting on it
How Do You Calculate Instantaneous Velocity at a Midpoint in Particle . . . The problem involves calculating the instantaneous velocity of a particle moving along the x-axis, described by the equation x = 9 35 + 1 03 t 3 The specific task is to find the instantaneous velocity at a midpoint between the particle's positions at t = 2 00 s and t = 3 00 s Exploratory, Assumption checking, Mathematical reasoning Participants discuss the need to find the value of t that
How Do I Calculate Time with Initial Velocity, Final Velocity, and . . . The context includes basic physics concepts related to constant acceleration and average velocity, with a focus on deriving a formula for time based on these parameters One participant seeks a formula to calculate time with given initial velocity, final velocity, and distance, specifically asking for help due to a lack of physics background
Should a Velocity vs. Height Graph for a Parachute Be Linear? The discussion revolves around the analysis of a velocity versus height graph for a parachute experiment conducted as part of A-level coursework The original poster expresses concern about their linear graph, questioning whether it accurately represents the expected relationship, given the influence of air resistance and terminal velocity