11 A truck is pulling an 85-kg rock attached by a rope. The coefficient of friction between the rock and the ground is 0.32. The truck applies 295 N of force to the rock. Determine the net force and the acceleration.

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Chapter6: Applications Of Newton's Laws
Section: Chapter Questions
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can you answer number 77 please.
s and
es.
You are designing another dolly-sandbag system for a different actor in the
performance. The mass of the dolly and actor combined is 76 kg, and the
mass of the sandbag is 18 kg. The coefficient of kinetic friction between the
dolly and the stage floor is 0.20. What is the acceleration?
NEED A HINT? Go online to your eText Sample Problem for stepped out support.
(15) You are designing one last sandbag-dolly system for the performance.
This time, two actors will be on the dolly. The mass of the dolly and actors
combined is 94 kg, and the mass of the sandbag is 35 kg. The coefficient
of kinetic friction between the dolly and the stage floor is 0.20. What is
the acceleration?
emetev2
neix
You decide to change the mass of the sandbag for the two actors to reduce
the acceleration. The mass of the dolly and actors combined is still 94 kg,
and the coefficient of kinetic friction between the dolly and the stage floor is
0.20. If you want the dolly to accelerate at 1.9 m/s², what should the mass of
the sandbag be?
ITI BOMBASAX3
11 A truck is pulling an 85-kg rock attached by a rope. The coefficient of friction oqge er ni bné is
between the rock and the ground is 0.32. The truck applies 295 N of force to ert zoob wohl nuitenb
the rock. Determine the net force and the acceleration.
(18) For a physics experiment, you stand on a scale in an elevator. You observe
that the scale only registers 88 percent of your actual weight as the elevator
begins to descend to a lower floor. Based on the data, determine the
acceleration of the elevator.
An Atwood machine is used in a stage production to make an actress appear
to fly up and out of view of the audience. The system consists of a 52-kg
actress and a 58-kg sandbag connected via a rope over a pulley. The sandbag
is released from rest. Determine the magnitude of the acceleration for both
the actress and sandbag. Assume the rope and pulley are massless.
(80) You are pulling on a rope to move two boxes, box 1 and box 2, that are
connected by a spring. The rope is connected to box 1, which is moving on
rollers; so you can ignore friction. The spring connects it to box 2, which is
on a surface with a coefficient of friction μ. If the boxes move with a constant
velocity, how much does the spring stretch?
(81) You are pulling on a rope to move two boxes, box 1 and box 2, that are
connected by a spring. The rope is connected to box 1, which is on a surface
with a coefficient of friction μ. The spring connects it to box 2, which is
moving on rollers, so you can ignore friction. If the boxes move with a
constant velocity, how much does the spring stretch?
3 Forces on Systems
89
Transcribed Image Text:s and es. You are designing another dolly-sandbag system for a different actor in the performance. The mass of the dolly and actor combined is 76 kg, and the mass of the sandbag is 18 kg. The coefficient of kinetic friction between the dolly and the stage floor is 0.20. What is the acceleration? NEED A HINT? Go online to your eText Sample Problem for stepped out support. (15) You are designing one last sandbag-dolly system for the performance. This time, two actors will be on the dolly. The mass of the dolly and actors combined is 94 kg, and the mass of the sandbag is 35 kg. The coefficient of kinetic friction between the dolly and the stage floor is 0.20. What is the acceleration? emetev2 neix You decide to change the mass of the sandbag for the two actors to reduce the acceleration. The mass of the dolly and actors combined is still 94 kg, and the coefficient of kinetic friction between the dolly and the stage floor is 0.20. If you want the dolly to accelerate at 1.9 m/s², what should the mass of the sandbag be? ITI BOMBASAX3 11 A truck is pulling an 85-kg rock attached by a rope. The coefficient of friction oqge er ni bné is between the rock and the ground is 0.32. The truck applies 295 N of force to ert zoob wohl nuitenb the rock. Determine the net force and the acceleration. (18) For a physics experiment, you stand on a scale in an elevator. You observe that the scale only registers 88 percent of your actual weight as the elevator begins to descend to a lower floor. Based on the data, determine the acceleration of the elevator. An Atwood machine is used in a stage production to make an actress appear to fly up and out of view of the audience. The system consists of a 52-kg actress and a 58-kg sandbag connected via a rope over a pulley. The sandbag is released from rest. Determine the magnitude of the acceleration for both the actress and sandbag. Assume the rope and pulley are massless. (80) You are pulling on a rope to move two boxes, box 1 and box 2, that are connected by a spring. The rope is connected to box 1, which is moving on rollers; so you can ignore friction. The spring connects it to box 2, which is on a surface with a coefficient of friction μ. If the boxes move with a constant velocity, how much does the spring stretch? (81) You are pulling on a rope to move two boxes, box 1 and box 2, that are connected by a spring. The rope is connected to box 1, which is on a surface with a coefficient of friction μ. The spring connects it to box 2, which is moving on rollers, so you can ignore friction. If the boxes move with a constant velocity, how much does the spring stretch? 3 Forces on Systems 89
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