The following information pertains to questions 1, 2, and 3. A workman pulls a sledacross an asphalt road using a rope at angle 0 above the horizontal direction. Theworkman pulls with 1,000[N] of force. The coefficients of friction of the sled withthe road are u=1.00 and µ=0.70. The sled has mass m. The sled is initially at rest.T710Q0[N].1) Which expression gives the magnitude of fmax for the situation illustrated above?A) mgB)mg – 1000cos(0)C)-mg + 1000cos(0)D) mg-1000sin(0)E) mg+ 1000sin(0)F) None of the above

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Principles of Physics: A Calculus-Based Text

5th Edition

ISBN:9781133104261

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter4: The Laws Of Motion

Section: Chapter Questions

Problem 56P

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A 3.00-kg object is moving in a plane, with its x and y coordinates given by x = 5t2 1 and y = 3t3 + 2, where x and y are in meters and t is in seconds. Find the magnitude of the net force acting on this object at t = 2.00 s.
Three forces act on an object, considered to be a particle, which moves with constant velocity v =(3 m/s)î +(−2 m/s)ĵ Two of the forces are shown in the picture below., while the third force, F_3 is not given. 1.) What are the x, y, and z components of F_3?
There are two forces on the 1.19 kg box in the overhead view of the figure but only one is shown. For F1 = 15.7 N, a = 14.7 m/s2, and θ = 34.1°, find the second force (a) in unit-vector notation and as (b) a magnitude and (c) a direction. (State the direction as a negative angle measured from the +x direction.)
A particle of mass 8.0 kg moves along the horizontal x-axis. In the x direction the only force acting on it is the force F shown in the graph below. The particle starts from rest at x=0. The values indicated in the graph are:F1=4.1N;x1=1.0 m;x2=3.3 m;x3=5.7 m; What is the velocity of the particle at position x2? Give your answer to two significant figures. a)1,4 m/s b)3,4 m/s c)1,7 m/s d)27 m/s e)14 m/s f)0,68 m/s g)20 m/s h)10 m/s
According to a simplified model of a mammalian heart, at each pulse, approximately 20 g of blood is accelerated from 0.26 m/s to 0.35 m/s during a period of 0.10 s. What is the magnitude of the force exerted by the heart muscle? Express your answer to two significant figures and include the appropriate units. F= ______ units I got 0.02N but it is wrong.
In the figure, a slab of mass m1 = 40 kg rests on a frictionless floor, and a block of mass m2 = 10 kg rests on top of the slab. Between block and slab, the coefficient of static friction is 0.60, and the coefficient of kinetic friction is 0.40. A horizontal force F→ of magnitude 104 N begins to pull directly on the block, as shown. In unit-vector notation, what are the resulting accelerations of (a) the block and (b) the slab?
A particle with a mass of 10 kg is moving at a velocity of (3t^2 + 4t)j m/s. What would be the expression for the external net force F(t) being applied to the particle? Note: i and j are unit vectors
A teenager of mass m1=50.6kgm1=50.6kg pushes backward against the ground with his foot as he rides his skateboard towards the right. This exerts a horizontal force of magnitude Ffoot=14.2NFfoot=14.2N. The skateboard has mass m2=2.5kgm2=2.5kg. (a) Write an expression for the magnitude of the horizontal component of the force, FgroundFground, that the ground exerts on the teenager's foot. (b) In terms of given quantities, write an expression for the magnitude of the skateboard's acceleration, aa, while the teenager is pushing backwards on the ground. (c) What is the numerical value of the magnitude, in meters per squared second, of the acceleration?
A particle’s motion is described in Cartesian coordinates by the following equations: x(t) = sin(t), y(t) = cos(t), z(t) = (2t + e^(−t) ) The units for position are given in meters. The particle has a mass of 5 kg. What is the magnitude of the net force acting on the particle at the instant t = 1 sec?
Three forces act on an object, considered to be a particle, which moves with constant velocity v = (3i ^ − 2j ^ ) m/s. Two of the forces are F→1 = (3i ^ + 5j ^ − 6k ^ ) N and F→2 = (4i ^ − 7j ^ + 2k ^ ) N. Find the third force.
An impala is an African antelope capable of a remarkable vertical leap. In one recorded leap, a 45 kg impala went into a deep crouch, pushed straight up for 0.21 s, and reached a height of 2.5 m above the ground. To achieve this vertical leap, with what force did the impala push down on the ground? What is the ratio of this force to the antelope’s weight?
A 4.0 kg toy car can move along an x axis. The figure gives Fx of the force acting on the car, which begins at rest at time t = 0. The scale on the Fx axis is set by Fxs = 4.0 N. In unit-vector notation, what is P→ at (a)t = 6.0 s and (b)t = 2.0 s,(c) what is v→ at t = 5.0 s?

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