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WorksheetsIQ4) Special Relativity
Total questions: 27
Worksheet time: 52mins
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
We are able to see into the past.
True
False
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
Consider two spaceships, each traveling at 0.50c in a straight line. Fergus' is moving directly away from the Sun and Blake's is approaching the Sun. The science officers on each ship measure the velocity of light coming from the Sun. What do they measure for this velocity?
Fergus' measures it as less than c, and Blake's measures it as greater than c.
Blake's measures it as less than c, and Fergus' measures it as greater than c.
On both ships it is measured to be less than c.
On both ships it is measured to be exactly c.
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 meter stick is moving toward you with a speed of 0.80c. What is its length?
zero
0.40m
0.60m
1.0m
Relative motion can best be defined as
the change in position of an object divided by change in time.
the amount of motion that an object experiences over a given period of time.
the motion of an object with a constant velocity.
the motion of one object as it appears to another object.
An observer notices that a clock moving with a speed of 0.650c advances 2.00 seconds. Is the corresponding elapsed time time on an identical clock at rest relative to the observer ____________ 2.00 seconds.
greater than
less than
equal to
An observer notices that a clock moving with a speed of 0.650c advances 2.00 seconds. How much time elapses on the identical clock at rest?
1.52 seconds
2.97 seconds
2.63 seconds
2.00 seconds
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
At one point in time, two twins are 30 years old. At this time, one of them gets on a rocket and travels at 0.8 c, for what he experiences to be 12 years. How old is the twin that remained on Earth when the traveling twin returns home?
20 years
50 years
40 years
80 years
A train has a rest length of 100 m. Traveling at a very high velocity, it goes through a tunnel of length 80 m. Observers located at both ends of the tunnel note that at one instant the train appears to exactly fit within the tunnel.
What is the velocity of the train expressed in units of c?
0.333 c
0.50 c
0.60 c
0.80 c
0.866c
Select all true statements.
this equation represents relativistic momentum
this equation represents time dilation
this equation represents length contraction
m represents the rest mass of an object and is measured by an observer at rest relative to the mass
m represents the rest mass of an object and is measured by an observer who is in motion relative to the mass
