COLLEGE PHYSICS
2nd Edition
ISBN: 9781464196393
Author: Freedman
Publisher: MAC HIGHER
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Chapter 4, Problem 32QAP
To determine
The magnitude of the normal force exerted by the ramp compare to the weight of the block
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The inclination of a frictionless inclined plane is θ and an object of mass m awaits at its top. What is the magnitude of the normal force exerted by the plane on the object during its motion on the inclined plane after the object is released?a) mg sinθ b) mg tan θ c) mgd) mg cosθe) mg cotθ
coefficient of friction is 0.35, slope of hill is 26 degrees, and mass of toboggan is 23.7 kg
Chapter 4 Solutions
COLLEGE PHYSICS
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- We know from studying friction forces that static friction increases with increasing normal force between the surfaces, which becomes important for vehicles traveling on icy or snowy roads that have coefficients of static friction much smaller than those of dry pavement. In particular, the greater the normal force on the drive wheels (those coupled to the engine), the better the traction. The horizontal position of the center of mass of a typical compact automobile is located 1.1 m toward the rear as measured from the front wheel axle. The wheelbase (distance from the front wheel axle to the rear wheel axle) is 2.7 m. Assume the car is stationary on level ground and has a weight of 12,000 N. Determine the total normal force on the two front tires and on the two rear tires. Which do you suppose are the drive wheels in this case?arrow_forward2)arrow_forwardA woman exerts a constant horizontal force on a large box. As a result, the box moves across a horizontal floor at a constant speed "v0". The constant horizontal force applied by the woman: has the same magnitude as the weight of the box. is greater than the weight of the box. has the same magnitude as the total force which resists the motion of the box. is greater than the total force which resists the motion of the box. is greater than either the weight of the box or the total force which resists its motion. If the woman in the previous question doubles the constant horizontal force that she exerts on the box to push it on the same horizontal floor, the box then moves: with a constant speed that is double the speed "v0" in the previous question. with a constant speed that is greater than the speed "v0" in the previous question, but not necessarily twice as great. for a while with a speed that is constant and greater than the speed "v0" in the previous question, then with a speed…arrow_forward
- A box rests on a level table. Let W be the weight of the box, and N is the normal of the table on the box. In magnitude, W is opposite and ___ N, and the two forces ___ action-reaction pair. Group of answer choices equals, are not equals, are is greater than, are is greater than, are notarrow_forwardA drill rod is used with a air hammer for making holes in hard rock so explosives can be placed in them. How many impulsive forces act on the drill rod during the drilling? Assume the weight of the drill rod is nonimpulsive 2 1,arrow_forward3) The figure below illustrates a block (mass = M) on a fixed inclined plane (ramp angle = 6). An external agent applies a horizontal force onto the block (toward the inclined plane). The magnitude of this force is F. The contacting surfaces have a coefficient of kinetic friction (µk). The block slides up the ramp with constant speed V. Determine an expression {M, 0, µk, g, V} for the magnitude (F) of the force applied by the agent. Farrow_forward
- A large box of mass 11.4 kg sits on a ramp that makes an angle of 30.1 degrees with the horizontal. The surface of the ramp is rough and the coefficients of static and kinetic friction are given as 0.56 and 0,38, respectively. We exert a force up the ramp (parallel to the ramp surface) so that the box does not move. Calculate the maximum and the minimum magnitude of the force we can exert so that the box does not move. Enter the difference between the maximum and the minimum force values here: Fmax-Fmin (in Newtons). On your paper, show all the forces on free-body diagrams, clearly show your work, your derivation and calculations. Make sure to include your physics-based reasoning.arrow_forwardA rope exerts a force of 50 N on a box to keep it stationary. If the box is on a plane inclined 25° from the horizontal and the coefficient of static friction is 0.29, calculate the normal force exerted on the box.arrow_forward8-63. Determine the smallest force P that will cause impending motion. The crate and wheel have a mass of 50 kg and 25 kg, respectively. The coefficient of static friction between the crate and the ground is , = 0.2, and between the wheel and the ground, = 0.5. *8-64. Determine the smallest force P that will cause impending motion. The crate and wheel have a mass of 50 kg and 25 kg. respectively. The coefficient of static friction between the crate and the ground is , = 0.5, and between the wheel and the ground μ = 0.3. O O O 127 10 L C A 300 mmarrow_forward
- Logs weighing 1.3 kg and 2.2 kg lie on a flat surface and are connected by a rope that breaks at a force of 20 N. The coefficient of friction between the lighter log and the base is 0.50, and between the heavier log and the base 0.30. With what maximum force can we pull the lighter log so that the string does not break?arrow_forward6) A railroad car which has a mass 9216 kg is constrained to move along a horizontal track under the action of a wind blowing in the direction of the track. The frictional resistance to the car motion is 1/200 of its weight. The force exerted by wind is P=kSu?, where S is the area of the backside of the railroad car, equals to 6 m², and u is the velocity of the wind relative to car, k=0.12. The absolute velocity of the wind is w=12 m/s. The initial velocity of the railroad car is 0. Determine: a) the maximum velocity vmax of the railroad car; b) the time T taken to reach this velocity; c) the distance x, travelled by the railroad car before reaching a velocity of 3 m/s.arrow_forwardDe 600 N 4 m 900 N 4 m A -6m 22- forces in member [ED] : F(ED) forces in member [DC]: F(DC) forces in member [BC] : F(BC) Which following one is TRUE? O A) F(EC)=1500 N O B) F(DC).cos37 = F(BC) O F(DC).sin37 = F(ED) O D) F(ED).sin53- F(DC) O E) F(ED).cos53 = F(DC)arrow_forward
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