Physics Fundamentals
2nd Edition
ISBN: 9780971313453
Author: Vincent P. Coletta
Publisher: PHYSICS CURRICULUM+INSTRUCT.INC.
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Chapter 5, Problem 44P
To determine
To evaluate: The acceleration of the 2.0 kg block is to be evaluated.
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*55 SSM ILW www Two blocks are in
contact on a frictionless table. A horizon-
tal force is applied to the larger block, as
shown in Fig. 5-50. (a) If m = 2.3 kg,
1.2 kg, and F=3.2 N, find the mag-
m2
nitude of the force between the two
blocks (b) Show that if a force of the same
magnitude F is applied to the smaller
block but in the opposite direction, the magnitude of the force be-
tween the blocks is 2.1 N, which is not the same value calculated in
(a). (c) Explain the difference.
Fig. 5-50
Problem 55.
27 Go Body A in Fig. 6-33 weighs
102 N, and body B weighs 32 N. The
coefficients of friction between A
and the incline are 0.56 and
P = 0.25. Angle 0 is 40°. Let the
positive direction of an x axis be up,
the incline. In unit-vector notation.
what is the acceleration of A if A is
initially (a) at rest. (b) moving up
the incline, and (c) moving down
the incline?
0
Frictionless,
massle pulley
Figure 6-33
Problems 27 and 28.
Block B in Fig. 6-31 weighs 711 N.The coefficient of static friction between block and table is 0.25; angle u is 30; assume that the cord between B and the knot is horizontal. Find the maximum weight of block A for which the system will be stationary.
Chapter 5 Solutions
Physics Fundamentals
Ch. 5 - Prob. 1QCh. 5 - Prob. 2QCh. 5 - Prob. 3QCh. 5 - Prob. 4QCh. 5 - Prob. 5QCh. 5 - Prob. 6QCh. 5 - Prob. 7QCh. 5 - Prob. 8QCh. 5 - Prob. 9QCh. 5 - Prob. 10Q
Ch. 5 - Prob. 11QCh. 5 - Prob. 12QCh. 5 - Prob. 13QCh. 5 - Prob. 14QCh. 5 - Prob. 15QCh. 5 - Prob. 16QCh. 5 - Prob. 1PCh. 5 - Prob. 2PCh. 5 - Prob. 3PCh. 5 - Prob. 4PCh. 5 - Prob. 5PCh. 5 - Prob. 6PCh. 5 - Prob. 7PCh. 5 - Prob. 8PCh. 5 - Prob. 9PCh. 5 - Prob. 10PCh. 5 - Prob. 11PCh. 5 - Prob. 12PCh. 5 - Prob. 13PCh. 5 - Prob. 14PCh. 5 - Prob. 15PCh. 5 - Prob. 16PCh. 5 - Prob. 17PCh. 5 - Prob. 18PCh. 5 - Prob. 19PCh. 5 - Prob. 20PCh. 5 - Prob. 21PCh. 5 - Prob. 22PCh. 5 - Prob. 23PCh. 5 - Prob. 24PCh. 5 - Prob. 25PCh. 5 - Prob. 26PCh. 5 - Prob. 27PCh. 5 - Prob. 28PCh. 5 - Prob. 29PCh. 5 - Prob. 30PCh. 5 - Prob. 31PCh. 5 - Prob. 32PCh. 5 - Prob. 33PCh. 5 - Prob. 34PCh. 5 - Prob. 35PCh. 5 - Prob. 36PCh. 5 - Prob. 37PCh. 5 - Prob. 38PCh. 5 - Prob. 39PCh. 5 - Prob. 40PCh. 5 - Prob. 41PCh. 5 - Prob. 42PCh. 5 - Prob. 43PCh. 5 - Prob. 44PCh. 5 - Prob. 45PCh. 5 - Prob. 46PCh. 5 - Prob. 47PCh. 5 - Prob. 48PCh. 5 - Prob. 49PCh. 5 - Prob. 50PCh. 5 - Prob. 51PCh. 5 - Prob. 52PCh. 5 - Prob. 53PCh. 5 - Prob. 54PCh. 5 - Prob. 55P
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- In Fig. 6-59, block 1 of mass m1 ? 2.0 kg and block 2 of mass m2 ? 1.0 kg are connected by a string of negligible mass. Block 2 is pushed by force F of magnitude 20 N and angle u ? 35°. The coefficient of kinetic friction between each block and the horizontal surface is 0.20. What is the tension in the string? (please don't copy-paste solution)arrow_forwardA car traveling at 53 km/h hits a bridge abutment.A passenger in the car moves forward a distance of 65 cm (with respect to the road) while being brought to rest by an inflated air bag.What magnitude of force (assumed constant) acts on the passenger’s upper torso, which has a mass of 41 kg?arrow_forwardA car traveling at 53 km/h hits a bridge abutment. A passenger in the car moves forward a distance of 65 cm (with respect to the road) while being brought to rest by an inflated air bag. What magnitude of force (assumed constant) acts on the passenger's upper torso, which has a mass of 45 kg?arrow_forward
- THREE 5-KG PACKAGES A, B, AND C ARE PLACED ON A CONVEYOR BELT THAT IS AT REST. BETWEEN THE BELT AND BOTH PACKAGES A AND C THE COEFFICIENTS OF FRICTION ARE us = BETWEEN PACKAGE B AND THE BELT THE COEFFICIENTS ARE us = 0.30 AND uK = 0.20%3; 0.15 AND H = 0.10. THE PACKAGES ARE PLACED ON THE BELT SO THAT THEY ARE IN CONTACT WITH EACH OTHER AND AT REST. DETERMINE WHICH, IF ANY, OF THE PACKAGES WILL MOVE AND THE FRICTION FORCE ACTING ON EACH PACKAGE. %3D 5 kg skg 5 kgarrow_forward6. A person steps horizontally off the roof of a single-story house that is 3.1 m high. When his feet hit the ground below, he bends his knees such that his torso decelerates over a distance of 0.65 m before coming to a stop. If the mass of his torso is 50 kg, what is the average net force exerted on his torso over this distance? [Ans 00 N& nssuming nositive v is in the unward direction]arrow_forwardBodyA in Fig. 6-33 weighs 102 N, and body B weighs 32 N. The coefficients of friction between A and the incline are us =0.56 and uk=0.25. Angle 0 is 40°. Let the positive direction of an x axis be up the incline. In unit-vector notation, what is the acceleration of A if A is initially (a) at rest, (b) moving up the incline, and (c) moving down the incline Frictionless, massless pulleyarrow_forward
- 3. 53 In Fig. 5-48, three connected blocks are pulled to the right on a horizontal frictionless table by a force of magnitude T, = 65.0 N. If m, = 12.0 kg. m, = 24.0 kg, and m, = 31.0 kg. calculate (a) the magnitude of the system's acceleration, (b) the tension T, and (c) the tension T. T2 T3 Fig. 5-48 Problem 53.arrow_forwardA 2.20 kg block is initially at rest on a horizontal surface. A horizontal force of magnitude 4.83 N and a vertical force are then applied to the block (Fig. 6-17). The coefficients of friction for the block and surface are µs = 0.4 and µk = 0.25. Determine the magnitude of the frictional force acting on the block if the magnitude of is (a) 8.00 N and (b) 12.0 N. (The upward pull is insufficient to move the block vertically.)arrow_forward58P. A block of mass m, = 3.70 kg on a frictionless inclined plane of angle 30.0° is connected by a cord over a massless, frictionless pulley to a second block of mass m, = 2.30 kg hang- ing vertically (Fig. 5-52). What are (a) the magnitude of the ac- celeration of each block and (b) the direction of the acceleration of m2? (c) What is the tension in the cord? 90.0arrow_forward
- (a) A block of mass 13.6 kg is sliding at an initial velocity of 4.65 m/s along horizontal surface right. The surface has a coefficient of kinetic friction of 0.254. How far will it slide before coming to rest? Calculate the time it takes to come to rest? (b) A motorcycle and a truck are both moving in the same direction in adjacent lanes on a highway. Mass of the truck is 8 times that of the motorcycle. At a particular truck instant, the speed of the motorcycle is four times as motorcycle 4v large as the speed of the truck v. Calculate the ratio of kinetic energies of the motorcycle and truck. Calculate the ratio of momentum of the two bodies.arrow_forward4-61. The drum has a weight of 500 N and rests on the floor for which the coefficient of static friction is 4, = 0.5. If a = 0.9 m and b= 1.2 m, determine the smallest magnitude of the force P that will cause impending motion of the drum.arrow_forward88 In Fig. 6-59, block 1 of mass m = 2.0 kg and block 2 of mass m2 = 1.0 kg are connected by a string of negligible mass. Block 2 is pushed by force F of magnitude 20 N and angle 0= 35°.The coef- %3D %3D %3D ficient of kinetic friction between each block and the horizontal surface is 0.20. What is the tension in the string? Fig. 6-59 Problem 88.arrow_forward
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