Physics (5th Edition)
5th Edition
ISBN: 9780321976444
Author: James S. Walker
Publisher: PEARSON
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Chapter 6.4, Problem 4EYU
Three boxes are connected by ropes and pulled across a smooth, horizontal surface with an acceleration a, as shown in Figure 6-21. The force applied to the first box on the right is F, the tension in the rope connecting the first
Figure 6-21 Enhance Your Understanding 4
and second boxes is T1, and the tension in the rope connecting the second and third boxes is T2.Rank the three forces (F, T1, T2) in order of increasing magnitude. Indicate ties where appropriate.
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The motor exerts a force of F= (201³) N on the cable,
where t is in seconds. (Figure 1)
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Determine the speed of the 25-kg crate when t-5s. The coefficients of static and kinetic friction between the crate
and the plane are , -0.3 and 4 -0.25, respectively.
Express your answer to three significant figures and include the appropriate units.
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Problem 1 Hi Friction
A box of mass m is on
an incline with 0 =
30°. It
There is
is connected to a massless rope and frictionless pulley where
another box of mass M is suspended as shown.
friction between the incline and mass m: the co-efficient of
static friction is
and the co-efficient of kinetic friction is
√3
3√3*
m
M
Draw a free-body diagram for each box.
(b) Suppose the box on the incline is not moving, what is the maximum mass the hanging box M could
be? What would this be in the case of no friction?
(Newton's laws and their applications) A block with mass m1 slides down an inclined plane whose angle
is 22 °, the coefficient of kinetic friction between the block and the plane is 0,250. The block is attached
to an ideal rope that passes through two ideal pulleys until it is attached to a fixed support, as shown in
figure 3. A rope leaves the axis of the movable pulley up to a block of mass m2
3
m2
m1
Figure 3. Diagram of exercise 3
A. Discuss what difference the exercise will make if one more pulley is placed on the ceiling that makes
the rope connect to the rod of the movable pulley.
Chapter 6 Solutions
Physics (5th Edition)
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, physics and related others by exploring similar questions and additional content below.Similar questions
- Suppose two children push horizontally, but in exactly opposite directions, on a third child in a wagon. The first child exerts a force of 75.0 N, the second exerts a force of 90.0 N, friction is 12.0 N, and the mass of the third child plus wagon is 23.0 kg. (a) What is the system of interest if the acceleration of the child in the wagon is to be calculated? (See the free-body diagram.) (b) Calculate the acceleration. (c) What would the acceleration be if friction were 15.0 N?arrow_forwardMA - 4 If you used an ideal pulley of the type shown in the figure above having a mass of 7.2 kg to support a car engine of mass 115 kg. a) What is the tension in the rope? b) What force must the ceiling supply, assuming you pull straight up on the rope?arrow_forward(Newton's laws and their applications) A block with mass m1 slides down an inclined plane whose angle is 22°, the coefficient of kinetic friction between the block and the plane is 0,250. The block is attached to an ideal rope that passes through two ideal pulleys until it is attached to a fixed support, as shown in 3 figure 3. A rope leaves the axis of the movable pulley up to a block of mass m2 m1. 2 m2 m1 Figure 3. Diagram of exercise 3 A. What is the relationship between the acceleration of block 1 and the acceleration of block 2.arrow_forward
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