• A block is acted upon by a force F causing it to accelerate on a horizontalplane. While the block is in motion, it is acted upon by an equal andopposite force. Describe the subsequent motion of the block;It still moves in the original direction with constant speed.It slows constantly then stops.It stops abruptly when the second force is appliedа.b.C.d. It slows, stops shortly then proceeds to move in the opposite direction

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Answered: A block is acted upon by a force F…

College Physics

1st Edition

ISBN:9781938168000

Author:Paul Peter Urone, Roger Hinrichs

Publisher:Paul Peter Urone, Roger Hinrichs

Chapter8: Linear Momentum And Collisions

Section: Chapter Questions

Problem 21CQ: Professional Application During a visit to the International Space Station, an astronaut was...

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Balancing carefully, three boys inch out onto a horizontal tree branch above a pond, each planning to dive in separately. The third boy in line notices that the branch is barely strong enough to support them. He decides to jump straight up and land back on the branch to break it, spilling all three into the pond. When he starts to carry out his plan, at what precise moment does the branch break? Explain. Suggestion: Pretend to be the third boy and imitate what he does in slow motion. If you are still unsure, stand on a bathroom scale and repeat the suggestion.
A system can have a nonzero velocity while the net external force on it is zero. Describe such a situation.
A force acts on a car of mass m so that the speed v of the car increases with position x as v=kx2 where kis constant and all quantities are in SI units. Find the force acting on the car as a function of position.
Professional Application During a visit to the International Space Station, an astronaut was positioned motionless in the center of the station, out of reach of any solid object on which he could exert a force. Suggest a method by which he could move himself away from this position, and explain the physics involved.
A force F1 of magnitude 6.00 units acts on an object at the origin in a direction u 5 30.0 degrees above the positive x-axis. A second force F2 of magnitude 5.00 units acts on the object in the direction of the positive y-axis. Find the magnitude and direction of the resultant F1 + F2. Show complete step-by-step process and solution.
A 285-g ball falls vertically downward, hitting the floorwith a speed of 2.5 m/s and rebounding upward with a speedof 2.0 m/s. (a) Find the magnitude of the change in the ball’smomentum. (b) Find the change in the magnitude of the ball’smomentum. (c) Which of the two quantities calculated in parts(a) and (b) is more directly related to the net force acting on theball during its collision with the floor? Explain and labled the problems.
A 59 kg boy and a 36 kg girl use an elastic rope while engaged in a tug-of-war on a frictionless icy surface. If the acceleration of the girl toward the boy is 1.7 m/s2, determine the magnitude of the acceleration of the boy toward the girl. Answer in unitirs of m/s2
The initially stationary 27-kg block is subjected to the time-varying horizontal force whose magnitude P is shown in the plot. Note that the force is zero for all times greater than 10 s. Determine the time ts at which the block comes to rest.
A block with a mass of m = 32 kg rests on a frictionless surface and is subject to two forces acting on it. The first force is directed in the negative x-direction with a magnitude of F1. The second has a magnitude of F2 and acts on the body at an angle θ = 23° measured from horizontal, as shown.Write an expression for the magnitude of the normal force, FN, acting on the block, in terms of F2 and the other variables of the problem. Assume that the surface it rests on is rigid. The two forces change such that F1 = 11 N and F2 = 21.5 N. Based on this change, the block may no longer be in static equilibrium. Find the block's acceleration in the x-direction, ax, in meters per second squared.
2a Two particles in contact with each other are acted on by several time-dependent forces and couples. Irrespective of the number and orientations of external forces and couples acting on the pair of particles, the two particles exert forces on each other which have the same magnitude, opposite directions, and a common line of action. The inter-particle forces may also be time-dependent. True False The sum of the forces acting on a particle is NOT equal to which of the following? Time rate of change of particle linear momentum. Sum of the applied couples. Product of the particle mass and its linear acceleration.
The diagram below shows a block of mass m=2.00kg on a frictionless horizontal surface, as seen from above. Three forces of magnitudes F1=4.00N, F2=6.00N, and F3=8.00N are applied to the block, initially at rest on the surface, at angles shown on the diagram. (Figure 1) In this problem, you will determine the resultant (total) force vector from the combination of the three individual force vectors. All angles should be measured counterclockwise from the positive x axis (i.e., all angles are positive). Part A) Calculate the magnitude of the total resultant force Fr= F1+F2+F3 acting on the mass. Part B) What angle does Fr make with the positive x axis? Part C) What is the magnitude and direction of the mass's acceleration vector, a ? Part D) How far (in meters) will the mass move in 5.0 s? Part E) What is the magnitude of the velocity vector of the block at t=5.0s? Part F) In what direction is the mass moving at time t=5.0s?
Determine the force Q-> when the block moves with constant velocity. Express your answer in vector form.

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