A boat on a lake is launched with an initial speed vo. The boat experiences a drag force from the water 6) F₁ = -beavû, where b and a are positive constants and û is unit vector in the direction of velocity. There are no other frictional forces acting on the boat. (a) Draw a free body diagram and use Newton's second law to determine the differential equations describing the boat's motion. (b) Solve the differential equations for the speed of the boat v(t). (c) Show that the time for the boat to come to rest is t = (m/ab)(1 — e¯avo).
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- Determine the applied force required to accelerate a 3.49-kg object rightward with a constant acceleration of 1.17 m/s/s if the force of friction opposing the motion is 17.2 N. Answer: NA 21.0-kg box is released on a 26 degree incline and accelerates down the incline at 0.24 m/s2 . a) Find the friction force impeding its motion. b) Determine the coefficient of kinetic friction.(Questions 16-18) A 25 kg box is at the bottom of a frictionless incline that is 7 m long as shown and makes an angle of 20 degrees with the horizontal. A person applies a constant horizontal (NOT parallel to the incline, but horizontal) force to the box, starting from rest. It reaches the top of the ramp in 13 seconds. 16. Draw a free-body diagram of this situation showing all forces on the box. 17. What was the magnitude of the box's acceleration during this process? 18. What was the magnitude of the force applied by the person?
- Why is static friction more complex in analysis than kinetic friction? Group of answer choices Because its magnitude and direction can vary Because it is invisible Because it does not depend on the normal force Because it depends on the kinetic frictionA micro-transporter moves from one side of an evacuated chamber to another. It is powered by equal-magnitude, opposite-sign charges Q and -Q on top of two station points, as shown in (Figure 1). The transporter's mass is 1.0 g and it is carrying a positive charge of 9.0 x 10-10 C. The figure shows a micro-transporter located between two stations on a horizontal surface. Figure The left station has charge plus upper Q. The right station has charge minus upper Q. The transporter carries positive charge q. The transporter is 6.0 millimeters from the left station and 36.0 millimeters from the right station. +Q Station ( + Station 6.0 mm 36.0 mmA physics textbook is placed on an inclined slope with an adjustable angle a. The coefficients of friction between the book and the slope are us = 0.5 and uk = 0.35 %3D respectively. 1m a (i) Initially the book is not moving. Copy the diagram and draw all the forces acting on the book. Show mathematical expressions for the size (magnitude) of each force. If we slowly increase the angle a, at what angle does the book start sliding? (ii) Use the Work-Energy theorem to find a formula (expression) for the speed v of the book when it reaches the bottom, in terms of the angle a.
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- A) Write an expression for the component of net force, Fnetx, in the x-direction, in terms of the variables given in the problem statement. Fnetx= Part (c) Write an expression for the magnitude of the normal force, F, acting on the block, in terms of F2, g, and the other variables of the problem. assume that the surface it rests on is ridged Part (d) Find the block's acceleration in the x-direction, ax, in meters per second squared.Topic: You find yourself trapped in the middle of a large frozen lake. Assume the ice has no friction. All you have on your is warm winter clothing and no way to call/signal for help. You can just barely see the shore in the distance. Use your physics knowledge of Newton's laws to help get you off the lake. Explain your reasoning.