Two children are walking at the same steady speed of 2 feet/second at the United terminal at O’Hare airport. One steps on the moving walkway and continues walking, while the other continues along the regular floor. The moving walkway moves in the direction of the child’s motion with speed 4 feet/second. The first child stops at the end of the moving walkway and waits 7 seconds for the second child to catch up. How long is the moving walkway (in feet)?

Q: Can someone please help me understand what I'm doing wrong on this one?

A: Acceleration is the rate of change of velocity. It is equal to the slope of the graph about the…

Q: O O O O =7.00 1 . I 160 190 1=5.00 16.00 100 130 1-5.00 -6.00 s 6 L 100 105 115 t-7.00 s -5.00 6…

A:

Q: The images of trees  come from a catalog advertising fast-growing trees. If we mark the position of…

A: Consider the table shown below for the tree growth with time.

Q: Based on the velocity and time graph given  how far does the object move in the interval from t=0…

A:

Q: In an airport moving walkways help get passengers to their gates faster. In one case a person stands…

A:

Q: I looked at the motion diagram and thought it was representing an object accelerating to the right…

A: Given, A motion diagram represnting an object accelerating to the right . So , net force must be…

Q: A car is moving along the x-axis and its velocity, vx, varies with time as shown in the figure. If…

A: The position of the object is related to its velocity by the equation,…

Q: A jet airplane touches down on an airport runway with a speed of 213 km/hr. It slows at a constant…

A:

Q: 80p 60

A: Slope of velocity time graph represent acceleration.

Q: A runner is moving with a speed of 2.68[m/s]. How long will it take the runner to complete a 5.0[km]…

A: The expression for find time taken by the runner to complete the race is t=dv

Q: The figure shows a graph of the velocity of an object as a function of time. What is the…

A: Acceleration = 20/2 = 10  ms-2  Equation  x = ut + (1/2)at2 x = 0×t + (1/2)at2 x = (1/2)at2  x =…

Q: A car moves along a straight road. It moves at a speed of 50 km/hr for 4 minutes, then during the…

A: This question belongs to kinematics.

Q: They stop for 5 min to repair the flat, but then realize they cannot fix it. They continue their…

A: Given:           The speed of the biker for first 5 min is constant             Then he stops at the…

Q: Use the velocity vs. time graph below to find the average acceleration over the entire interval.…

A: Velocity Vs time graph  Final velocity is Vf = 2 m/s at Tf = 14 s  Initial velocity is Vi = - 3 m/s…

Q: +50.0 +40.0 +30.0 A +20.0 +10.0 0.5 1.0 1.5 2.0 2.5 3.0 Time (h) Position x (km)

A: The given values with suitable variables are listed below. Here, xiA denotes the initial position…

Q: Concept Simulation 2.3 offers a useful review of the concepts central to this problem. An astronaut…

A:

Q: To deter speeding through a residential area, the Police set up a speed trap on Illusion Drive.…

A: Given Speed limit is v= 30 mph=13.41 m/s Distance is d=50 m

Q: A car is waiting at an intersection. When the traffic light turns green, the car starts moving.…

A:

Q: Figure 1 shows the velocity-time graph of a person moving along one straight path called the x-axis.…

A:

Q: An elevator in a high-rise building goes up and down at the same speed. Starting at the ground…

A:

Q: The velocity of an object in one- dimensional motion is v(t) = (3.00 t + 5.00 t2) m/s, where t is…

A: Acceleration is nothing but the rate of change of velocity i.e change is velocity per time. So in…

Q: Compute your average velocity in the following two cases: (a) You walk 60.3 m at a speed of 1.37 m/s…

A: GIVEN      walk for 1.00 min  a speed of 1.37 m/s then run for 1.89 min at 3.16 m/s along a straight…

Q: Your favorite car goes zero to 60 mph in 3.5 seconds. Assuming it accelerates uniformly, sketch a…

A: Assume car to be travelling in straight line. Let u be the car’s initial velocity, v be the car’s…

Q: In this graph of displacement versus time, what is the average velocity in going from point B to…

A: Average velocity = (final position - initial position)/time taken  Final position (point J) =1m…

Q: A large volcanic eruption triggers a tsunami. At a seismic station 210 km away, the instruments…

A:

Q: While trying to make an important decision, your roommate paces back and forth along the hallway…

A: There are three time interval given. Lets calculate the average velocity for all three time…

Q: You are observing the poles along the side of the road. You have already stopped and measured the…

A:

Q: Emily challenges her husband, David, to catch a $1 bill as follows. She holds the bill vertically,…

A: Write the kinematic equation.

Distance and Speed

The speed, distance and time relation forms the basis of study of motion. You will need these concepts in the study of Mechanics. This concept is applicable for students who are studying the following courses –