Worksheetsrelativity
Total questions: 56
Worksheet time: 47mins
A rocket leaves Earth and travels to a star that is 20 light years (one light year equals 9.46E15 meters) as seen by the Earth. The speed of the rocket is 0.8c relative to the Earth. The time for the trip as measured on by the astronauts in the spaceship is
25 years
20 years
15 years
12 years
There are two clocks one is stationary on the earth the other is traveling close to the speed of light around the earth. If we put the clocks back together after the second clock makes it back from its trip, the times are compared. What do you expect to occur?
More time elapsed on the stationary clock
More time elapsed on the traveling clock
No time has changed between them
Based on the concepts of Special Relativity time travel is...
not possible
possible only in the ability to travel into the past.
possible only in the ability to travel to the future.
possible to travel either forward or backward in time.
We are able to see into the past.
True
False
Magic Drucker flies by riding his roaring ladder of flyingness at 2.5x108 m/s. He calls out that his flying ladder has a length of 12m. At the risk of permanent Physics class failure, you shout out that you disagree and that the ladder is really how long?
8.2m
6.6m
4.1m
4.9m
The muon detection experiment helped confirm one aspect of special relativity, namely that:
to a muon distance was contracted.
muons are created in the upper atmosphere.
muons are relatively short-lived.
fewer muons reach the ground than expected.
The two postulates of special relativity are:
The laws of physics are the same in all inertial frames of reference.
The laws of physics are the same in all non-inertial frames of reference.
The speed of light in a vacuum is c in all inertial frames of reference.
The speed of light in a vacuum is c unless in an inertial frame of reference.
Newtonian Physics does not explain...
The lifetime of muons.
Light being able to travel through a vacuum.
Impulse and momentum.
Space and time.
A passenger at the rear of a train traveling at 15 m/s relative to the ground throws a baseball with a speed of 15 m/s in the direction opposite the motion of the train. What is the velocity of the baseball relative to the ground as it leaves the thrower’s hand? In other words: how fast does a person on the ground see the ball move?
30 m/s
15 m/s
0 m/s
20 m/s
A train is traveling 50 m/s north on a track. A passenger on the train walks to the bathroom 1 m/s to the north. What is the speed of the passenger relative to the train?
1 m/s
51 m/s
49 m/s
50 m/s
A dog and a cat are at a stand-off, running towards each other, both at 12 m/s. What is the magnitude of velocity of the cat relative to the dog?
12 m/s
24 m/s
0 m/s
6 m/s
What is proper time?
Coordinate time
Elapsed time
Time at the event
Length contraction is
is the phenomenon that a moving object's length is measured to be shorter than its proper length, which is the length as measured in the object's own rest frame.
is the phenomenon that a moving object's length is measured to be longer than its proper length, which is the length as measured in the object's own rest frame.
What is true about special relativity?
object moves at a constant velocity close to the speed of light.
object moves at a constant acceleration close to the speed of light.
objects in the same inertial frame of reference will experience time dilation.
objects in the same inertial frame of reference will experience different times passing.
An astronaut shines a flashlight at a spaceship heading at them at a speed of 1 x 10^8 m/s. How fast is th light approaching the ship?
2 x 10^8 m/s
3 x 10^8 m/s
1 x 10^8 m/s
2.5 x 10^8 m/s
There are two clocks one is stationary on the earth the other is traveling close to the speed of light around the earth. If we put the clocks back together after the second clock makes it back from its trip, the times are compared. What do you expect to occur?
More time elapsed on the stationary clock
More time elapsed on the traveling clock
No time has changed between them
Proper length is in the same inertial frame of reference as..
contracted length
dilated time
proper time
A factor that can be used to calculate changes in time, mass and length as objects move to close to relativistic speeds.
Morely factor
Michelson Factor
Lorentz Factor
Einstein Factor
What two (2) types of relativity did Einstein create theories for?
(a)
What did Einstein call his four-dimensional system ?
(a)
What are the name of Einsteins (4) dimenions?
X, Q, T, Y
X, Z, Y, T
X, L, R, T
X, Y, Q, S
According to Einstein's general theory of relativity, light should what? around massive objects
(a)
Based on the concepts of Special Relativity time travel is...
not possible
possible only in the ability to travel into the past.
possible only in the ability to travel to the future.
possible to travel either forward or backward in time.
As the velocity of Hayden's spaceship increases, he would observe
That his precision clock runs slower than normal
That the length of his spaceship has decreased
All of the given answers
None of the given answers
Hasee's boat can travel 4.0 m/s in still water. With what speed, relative to the shore, does it move in a river that is flowing at 1.0 m/s if the boat is heading downstream?
3.0 m/s
4.1 m/s
4.8 m/s
5.0 m/s
Lachlan's spaceship takes a nonstop journey to a planet and returns in 10 hours according to a clock on the spaceship. If the speed of the spaceship is 0.80c, how much time has elapsed on the Earth?
3.2h
7.0h
15h
17h
A set of twins, Abbey and Angelina, are initially 10 years old. While Angelina remains on Earth, Abbey rides on a space ship which travels away from Earth at a speed of 0.6c for five years (as measured by Angelina), then turns around and comes back at 0.6c. When Abbey returns, Angelina is 20 years old. How old is Abbey upon her return?
10
12
18
20
A meter stick is moving toward you with a speed of 0.80c. What is its length?
zero
0.40m
0.60m
1.0m
What is the momentum in kg m/s of a proton when it is moving with a speed of 0.60c?
1.2 x 10-19 kg*m/s
1.5 x 10-19 kg*m/s
3.0 x 10-19 kg*m/s
3.8 x 10-19 kg*m/s
During a reaction, an element loses 4.8 x 10-28 kg of mass. How much energy (in Joules) is released?
4.3 x 10-11 J
1.4 x 10-11 J
1.6 x 10-11 J
5.3 x 10-11 J
The atomic bomb that was dropped on Nagasaki in 1945 killed 140,000 people, helping to end World War II on the next day. It released energy equivalent to that of 20,000 tons of TNT explosive. How much mass was converted to energy when this took place?
(1000 tons of TNT = 4.3 x 1012 J)
Incidentally, modern H-bombs have energy yields 1000 times as much!
1g
10g
100g
1kg
