COLLEGE PHYSICS
2nd Edition
ISBN: 9781464196393
Author: Freedman
Publisher: MAC HIGHER
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Chapter 5, Problem 45QAP
To determine
The force applied to the object.
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Students have asked these similar questions
8)
Two blocks of masses ml and m2 are oriented as shown in the
diagram. The block ml moves on a surface with coefficient of
kinetic friction μ1, and the coefficient of static friction between the
two blocks is μ2. What is the minimum force F which must be
applied to ml such that m2 remains stationary relative to m1?
=
M2
F
FF
m2
ml
M² (Block 21 Fir² = m₂a
Fix/ma
9=
F=
12+
mgm,
ma
Block 1: F-F-F=m, a F-m,gu₁₂ = F12/m2
12
m.g
Fimm, gu,
PROBLEM 2
• An elevator and its load have a total mass of
800kg.Find the tension in the supporting
cable when the elevator or lift originally
moving downwards at 10m/s is brought to
rest with a constant acceleration in a distance
25m
Answer T-9600N.Since T> W the system is
retarding.
X
Figure 5-29
Three astronauts, propelled by jet backpacks, push and guide a 120 kg asteroid toward a processing dock,
exerting the forces shown in Figure 5-29, with F1 = 32 N, F2 = 54 N, F3 = 41 N, 01 = 30°, and 03 = 60°. What is
the asteroid's acceleration in unit-vector notation?
Chapter 5 Solutions
COLLEGE PHYSICS
Ch. 5 - Prob. 1QAPCh. 5 - Prob. 2QAPCh. 5 - Prob. 3QAPCh. 5 - Prob. 4QAPCh. 5 - Prob. 5QAPCh. 5 - Prob. 6QAPCh. 5 - Prob. 7QAPCh. 5 - Prob. 8QAPCh. 5 - Prob. 9QAPCh. 5 - Prob. 10QAP
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- An automobile driver traveling down an 8% grade slams on his brakes and skids 30 m before hitting a parked car. A lawyer hires an expert who measures the coefficient of kinetic friction between the tires and road to be k = 0.45. Is the lawyer correct to accuse the driver of exceeding the 25-MPH speed limit? Explain.arrow_forwardA block of ice (m = 15.0 kg) with an attached rope is at rest on a frictionless surface. You pull the block with a horizontal force of 95.0 N for 1.54 s. a. Determine the magnitude of each force acting on the block of ice while you are pulling. b. With what speed is the ice moving after you are finished pulling? Repeat Problem 71, but this time you pull on the block at an angle of 20.0.arrow_forwardThe uniform crate has a mass of 150 kg. If the coefficient of static friction between the crate and the floor is us = 0.2, determine the smallest mass of the man so he can move the crate. The coefficient of static friction between his shoes and the floor is us = 0.45. Assume the man exerts only a horizontal force on the crate 2.4 m 1.6 m -1.2 m-arrow_forward
- QUESTION 2 A block is pushed across a horizontal surface by the force shown. If the coefficient of kinetic friction between the block and the surface is 0.30, F = 20 N, e = 30°, and M = 3.0 kg, what is the magnitude of the acceleration of the block? F M O 2.3 m/s2 O 1.8 m/s2 O 5.4 m/s2 O 3.3 m/s2 O 2.8 m/s2arrow_forward4) Cindy wants to move a 20 kg chair to a different spot in her living room. She puts slippery disks, "sofa sliders", under the feet of the chair and pushes the chair at a steady 0.4 m/s across the room. The slippery disks have a coefficient of kinetic friction 4 = 0.07. How much force does she apply to push the sofa across the room? 0.8 N 13.7 N 0.6 N 1.4 Narrow_forward1.) An athlete slides down from rest 40.0 meter along an icy hill which is 35 degrees from the horizontal. He then continues sliding on the level ice. a) If the coefficient of kinetic friction between the athlete and ice is 0.20 (neglect air resistance) find speed (m/s) of athlete at the foot of the plane. b) ) find the distance (m) from the foot of the plane to the point where he has landed to the level icearrow_forward
- 3- The student pushes horizontally on a 37 kg box with a force of 115 N. The coefficient friction between the box and the floor is 0.37. What is the frictional force on the crate from the floor? a- 115 b- 230 c-110 d-121arrow_forwardQuestion 9 A 13 kg object undergoes an acceleration given by a (4 î- 3) m/s?. The magnitude of the resultant force acting on the object equals:arrow_forward1. Consider the forces acting on these three changes and list in order of the magnitude of the force starting with the smallest. A --- r B -4 +q +q Find FA Find Fa Find Fe List in order of the magnitudearrow_forward
- Problem 2 A crate rests on the flatbed of a truck traveling at 15m/s on a level road. The driver applies the breaks and the truck is brought to a halt in a distance of 38m. If the deceleration of the truck is constant, what is the minimum coefficient of friction between the crate and the truck to keep the crate from falling: (a) 0.2 (b) 0.3 (c) 0.6 (d) cannot be determinedarrow_forward2) m, m, 2, Two masses are attached by a string over a pulley as shown above. The hanging mass is 4.00 kg and the mass on the ramp is 5.00 kg. The angle of inclination of the ramp is 30.0° and the coefficient of kinetic friction between the mass and ramp is 0.250. The masses are released; what is the acceleration of the hanging mass? What is the minimum coefficient of static friction such that the masses do not move when they are released?arrow_forward27 - A diver with a mass of 70 kg jumps from the 10.0 meter high tower for a direct-vertical dive. Its movement ends at 2.50 meters below the water level. Find the average drag force exerted by the water on the diver. A) 1.05 kN B) 4.12 kN C) 3.09 kN D) 5.34 kN E) 1.50 kNarrow_forward
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