|| A 2 kg block is launched up a frictionless inclined plane by a spring as shown in Figure 5.64. The plane is inclined at 30° and the spring constant is 1000 N/m. The block is initially pushed against the spring in order to compress the spring 0.1 m, and then it is released. (a) Calculate the magnitude and direction of the acceleration of the block the moment after it is released. (b) Calculate the acceleration when the spring reaches the point where its compression is 0.05 m. (c) What are the magnitude and direction of the acceleration when the spring reaches the point where its compression is zero? Figure 5.64 Problem 57.
|| A 2 kg block is launched up a frictionless inclined plane by a spring as shown in Figure 5.64. The plane is inclined at 30° and the spring constant is 1000 N/m. The block is initially pushed against the spring in order to compress the spring 0.1 m, and then it is released. (a) Calculate the magnitude and direction of the acceleration of the block the moment after it is released. (b) Calculate the acceleration when the spring reaches the point where its compression is 0.05 m. (c) What are the magnitude and direction of the acceleration when the spring reaches the point where its compression is zero? Figure 5.64 Problem 57.
|| A 2 kg block is launched up a frictionless inclined plane by a spring as shown in Figure 5.64. The plane is inclined at 30° and the spring constant is 1000 N/m. The block is initially pushed against the spring in order to compress the spring 0.1 m, and then it is released. (a) Calculate the magnitude and direction of the acceleration of the block the moment after it is released. (b) Calculate the acceleration when the spring reaches the point where its compression is 0.05 m. (c) What are the magnitude and direction of the acceleration when the spring reaches the point where its compression is zero?
1. A charge of -25 μC is distributed uniformly throughout a spherical volume of radius 11.5 cm.
Determine the electric field due to this charge at a distance of (a) 2 cm, (b) 4.6 cm, and (c) 25 cm from
the center of the sphere.
(a) =
=
(b) E =
(c)Ẻ =
=
NC NC NC
1.
A long silver rod of radius 3.5 cm has a charge of -3.9
ис
on its surface. Here ŕ is a unit vector
ст
directed perpendicularly away from the axis of the rod as shown in the figure.
(a) Find the electric field at a point 5 cm from the center of the rod (an outside point).
E =
N
C
(b) Find the electric field at a point 1.8 cm from the center of the rod (an inside point)
E=0
Think & Prepare
N
C
1. Is there a symmetry in the charge distribution? What kind of symmetry?
2. The problem gives the charge per unit length 1. How do you figure out the surface charge density σ
from a?
1. Determine the electric flux through each surface whose cross-section is shown below.
55
S₂
-29
S5
SA
S3
+ 9
Enter your answer in terms of q and ε
Φ
(a) s₁
(b) s₂
=
-29
(C) Φ
զ
Ερ
(d) SA
=
(e) $5
(f) Sa
$6
=
II
✓
-29
S6
+39
Campbell Essential Biology with Physiology (5th Edition)
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