A 25.0-cm-long metal rod lies in the . xy -plane and makes an angle of 36.9° with (he positive x -axis and an angle of 53.1° with the positive y -axis. The rod is moving in the +. x -direction with a speed of 6.80 m/s. The rod is in a uniform magnetic field B → = ( 0 .120 T ) i ^ − ( 0 .220 T ) k ^ . (a) Whit is the magnitude of the emf induced in the rod? (b) Indicate in a sketch which end of the rod is at higher potential.
A 25.0-cm-long metal rod lies in the . xy -plane and makes an angle of 36.9° with (he positive x -axis and an angle of 53.1° with the positive y -axis. The rod is moving in the +. x -direction with a speed of 6.80 m/s. The rod is in a uniform magnetic field B → = ( 0 .120 T ) i ^ − ( 0 .220 T ) k ^ . (a) Whit is the magnitude of the emf induced in the rod? (b) Indicate in a sketch which end of the rod is at higher potential.
A 25.0-cm-long metal rod lies in the .xy-plane and makes an angle of 36.9° with (he positive x-axis and an angle of 53.1° with the positive y-axis. The rod is moving in the +.x-direction with a speed of 6.80 m/s. The rod is in a uniform magnetic field
B
→
=
(
0
.120 T
)
i
^
−
(
0
.220 T
)
k
^
. (a) Whit is the magnitude of the emf induced in the rod? (b) Indicate in a sketch which end of the rod is at higher potential.
Truck suspensions often have "helper springs" that engage at high loads. One such arrangement is a leaf spring with a helper coil spring mounted on the axle, as in the figure below. The helper spring engages when the main leaf spring is compressed by distance yo, and then helps to
support any additional load. Consider a leaf spring constant of 5.45 × 105 N/m, helper spring constant of 3.60 × 105 N/m, and y = 0.500 m.
Truck body
Dyo
Axle
(a) What is the compression of the leaf spring for a load of 4.90 × 105 N?
m
(b) How much work is done compressing the springs?
]
A skier of mass 75 kg is pulled up a slope by a motor-driven cable.
(a) How much work is required to pull him 50 m up a 30° slope (assumed frictionless) at a constant speed of 2.8 m/s?
KJ
(b) What power (expressed in hp) must a motor have to perform this task?
hp
A block of mass 1.4 kg is attached to a horizontal spring that has a force constant 900 N/m as shown in the figure below. The spring is compressed 2.0 cm and is then released from rest.
a
x = 0
x
b
(a) A constant friction force of 4.4 N retards the block's motion from the moment it is released. Using an energy approach, find the position x of the block at which its speed is a maximum.
cm
(b) Explore the effect of an increased friction force of 13.0 N. At what position of the block does its maximum speed occur in this situation?
cm
Chapter 29 Solutions
University Physics with Modern Physics (14th Edition)
Campbell Essential Biology with Physiology (5th Edition)
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What is Electromagnetic Induction? | Faraday's Laws and Lenz Law | iKen | iKen Edu | iKen App; Author: Iken Edu;https://www.youtube.com/watch?v=3HyORmBip-w;License: Standard YouTube License, CC-BY