h a = 0.9 on. NA 3049.74 dA NB 1855.26 .G Determine normal forces at A and B. You are forced to pull a group of kindergarteners in a cart. You apply a horizontal force of F = 450 N. The cart has a total mass of m= 500 kg with a center of mass at G. Assume the wheels have negligible mass, negligible size (r) and no rolling resistance. dA=0.73 m and dg = 1.2 m. You apply the horizontal force at a height y = 0.4 m from the ground. The center of gravity G is located at a height h = 1.2 m from the ground. Determine acceleration of the cart m XN XN da B y UBC Engineering

Physics 121 Spring 2021 - Document #11: Homework #04 & Reading Assignment page 4 of 8 Problem 1: Gnome Ride - This from a Previous Exam I. A Gnome of given mass M goes on the Gnome Ride as follows: He stands on a horizontal platform that is connected to a large piston so that the platform is driven vertically with a position as a function of time according to the following equation: y(t) = C cos(wt) Here w is a constant given angular frequency, C is a given constant (with appropriate physical units) and y represents the vertical position, positive upward as indicated. Part (a) - What is the velocity of the Gnome at time t = 0? Explain your work. Present your answer in terms of the given parameters Part (b) – What is the net force on the Gnome at time t = 0? Explain your work. Present your answer in terms of the given parameters Part (c) – What is the Normal Force on the Gnome at time t = 0? Explain your work. Present your answer in terms of the given parameters Some Possibly Useful…

2. (Inspired by a walk in Baker Student Center.) An escalator handles a steady load of 30 people per minute taking them from the first to the second floor through a vertical rise of 24 feet. Let us say the average person riding the elevator weighs 160 lb. a. What output power on a motor do you require to drive the unit? Take literally one minute to find an electric motor online that could do this job. You can search “_ hp electric motor" and state the motor name, power, cost, and vendor. Of course, round up your hp, not down to meet your specs. (In practice, this is an area where you can spec the motor in equivalent Watts, if you choose.) b. What is the electric power that is input to the motor considering losses within the escalator system due to friction, vibration, etc.? Your chosen motors surely have a different efficiencies and sources may even present efficiency as a function of power/rpm, so let's all use the value of e= 0.85 for consistency.

Intro to Transport Processes TRUE or FALSE. Please provide a quick explanation thanks! 1. Each molecule of a system has a certain quantity of mass, thermal energy, or momentum associated with it. 2. Momentum transport in a fluid depends bulk movement of molecules and not on individual molecule of the system.  3. At same mass, the momentum of a molecule is greater than the other molecules if it has less velocity?

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Given: The plane accelerates in its current trajectory with a= 100 m/s^2 Farag Angle theta= 5° W=105 kips F_drag= 80 kips m= 1000 lbs Find: F_thrust, F_lift Please include the KD. Fthrust Futel t Fueight 000 BY NC SA 2013 Michael Swanbom

Recall the discussion on spacecraft from the chapter opener. The following problems consider a rocket launch from Earth’s surface. The force of gravity on the rocket is given by F(d)=−mk/d2, where m is the mass of the rocket, d is the distance of the rocket from the center of Earth, and k is a constant. 172.  As the rocket travels away from Earth’s surface, there is a distance D where the rocket sheds some of its mass, since it no longer needs the excess fuel storage. We can write this function as F(d)=⎨(−m↓1 k / d^2) if d < D                                                                                  (−m↓2 k / d^2) if d ≥ D Is there a D value such that this function is continuous, assuming m1≠m2?

From the image below, identify the values of the position coordinates SA and SB. SA is for block A and B is for pulley B. Datum 2 4m 2m $A Number $B = Number m m B с ▬▬ Datum 1 5m 3m A @ 09 Engineering

You are watching a live concert. You can also find the concert streaming live on Spotify. About how far must you stand from the stage in order for the live concert and the live stream to be perfectly in sync? HINT: Assume the radio signal (Spotify) has to travel all the way around the Earth. circumference of the Earth (average): 40,041,000 m Speed of sound: 345 m/s Speed of light: 300,000,000 m/s

I could really use some assistance on part b,c,d,e,f