western50
Nov 6, 2010, 10:08 PM
Planet X of mass m1 orbits a Sun in uniform circular motion at a distance r1 and speed v1. The mass of the Sun is MS1 and its radius is RS1 as shown in the figure below.
https://online-s.physics.uiuc.edu/cgi/courses/shell/common/showme.pl?courses/phys100/fall10/hwb/10/02/orbit.gif
1. If the planet's mass were doubled, how would a, the magnitude of its acceleration, change?
a would decrease.
a would remain the same.
a would increase.
Consider another solar system in which Planet Y of mass m2 = 2 m1 orbits a Sun of mass MS2 = 2 MS1 and radius RS2 = 2RS1 at a distance r2 = 2r1. Further, suppose R2, the radius of Planet Y is twice R1, the radius of Planet X.
2. How would w2, your weight on Planet Y, compare to w1, your weight on Planet X?
w2 < w1
w2 = w1
w2 > w1
3. How does P2, the period of the orbit of the Planet Y, compare to P1, the period of the orbit of Planet X
P2 = (1/2) P1
P2 = P1
P2 = 2 P1
P2 = 4 P1
We do not have enough information to answer this question. We need to be given v2, the speed of the second planet in its orbit.
A block of mass M rests on a frictionless inclined plane of angle θ as shown in the diagram below. Two springs of equal length are connected to the block and to two posts as shown. The separation between the posts is equal to the sum of relaxed lengths of the springs and the length of the block.
https://online-s.physics.uiuc.edu/cgi/courses/shell/common/showme.pl?courses/phys100/fall10/hwb/10/02/springs.gif
4. The force the bottom spring exerts on the block is in the opposite direction of the force that the top spring exerts on the block.
TRUE
FALSE
5. Suppose the top (bottom) spring is stretched (compressed) from its relaxed length by an amount δx = 0.082 m. If the spring constant of the top spring is twice that of the bottom spring and M = 0.25 kg and θ = 30o, what is k, the spring constant of the bottom spring?
k = 1.66 N/m
k = 2.22 N/m
k = 3.33 N/m
k = 4.98 N/m
k = 6.44 N/m
https://online-s.physics.uiuc.edu/cgi/courses/shell/common/showme.pl?courses/phys100/fall10/hwb/10/02/orbit.gif
1. If the planet's mass were doubled, how would a, the magnitude of its acceleration, change?
a would decrease.
a would remain the same.
a would increase.
Consider another solar system in which Planet Y of mass m2 = 2 m1 orbits a Sun of mass MS2 = 2 MS1 and radius RS2 = 2RS1 at a distance r2 = 2r1. Further, suppose R2, the radius of Planet Y is twice R1, the radius of Planet X.
2. How would w2, your weight on Planet Y, compare to w1, your weight on Planet X?
w2 < w1
w2 = w1
w2 > w1
3. How does P2, the period of the orbit of the Planet Y, compare to P1, the period of the orbit of Planet X
P2 = (1/2) P1
P2 = P1
P2 = 2 P1
P2 = 4 P1
We do not have enough information to answer this question. We need to be given v2, the speed of the second planet in its orbit.
A block of mass M rests on a frictionless inclined plane of angle θ as shown in the diagram below. Two springs of equal length are connected to the block and to two posts as shown. The separation between the posts is equal to the sum of relaxed lengths of the springs and the length of the block.
https://online-s.physics.uiuc.edu/cgi/courses/shell/common/showme.pl?courses/phys100/fall10/hwb/10/02/springs.gif
4. The force the bottom spring exerts on the block is in the opposite direction of the force that the top spring exerts on the block.
TRUE
FALSE
5. Suppose the top (bottom) spring is stretched (compressed) from its relaxed length by an amount δx = 0.082 m. If the spring constant of the top spring is twice that of the bottom spring and M = 0.25 kg and θ = 30o, what is k, the spring constant of the bottom spring?
k = 1.66 N/m
k = 2.22 N/m
k = 3.33 N/m
k = 4.98 N/m
k = 6.44 N/m