At the beginning of the interval, the astronaut is moving toward the right along the x-axis at 14.6 m/s, and at the end of the interval she is moving toward the right at 5.2 m/s. Express your answer in meters per second squared.

Q: Suppose that Penny's spaceship zooms past Jane at a speed of 2.236 x 108 m/s. What does Jane observe…

A:

Q: A starship passes Earth with speed of v1 and sends a drone forward with speed v2 relative to itself…

A: The speed of the drone relative to planet E vDE is calculated under relativistic case by using the…

Q: At what relative velocity is Ƴ = 2.00 ?

A:

Q: The fastest spaceship ever launched was the Helios 2 spacecraft. At its closest approach to the sun,…

A: Given:_          velocity of the object v=69,000m/s

Q: A 100 m long steel beam is moving past the Earth. Observers on the Earth actually measure the steel…

A: Given data :- actual length L0 = 100 m apparent length L = 50 m

Q: In the free fall lab, after we do curve fit to the experimental points, Excel displayed a fitting…

A: Given : y = 5.0 x + 1

Q: At relativistic speeds, the distances are different. Why?

A: All the observers agree upon one thing, which is the relative speed. Consider clocks measuring…

Q: A spaceship in distress sends out two escape pods inopposite directions. One travels at a speed…

A: It is given that, v1=0.7cv2=-0.8c

Q: A 100-m-long train is heading for an 80-m-long tunnel. If the train moves sufficiently fast, is it…

A: If it is possible for the train to be inside the tunnel at an instant of time if it moves with…

Q: You are flying on a plane. Your friend is on the ground. The lights on the wing of the plane blink…

A: The friend is on ground and the person is on a airplane.  The lights on the wing of plane blink at…

Q: In an Earth reference frame, a star is 44 light-years away. At what per cent of the speed of light…

A:

Q: A man moves on ground with a speed of 2ms-1 towards a train moving towards him with 40ms-1 on…

A: Train is moving in the opposite direction of person.

Q: You are in a rocket ship going faster and faster. As your speed increases and your velocity gets…

A: When a spaceship is moving at velocities comparable to the speed of light, the relativistic effects…

Q: What two speed measurements will two observers in relative motion always agree upon?

A: The speed of light in vacuum is the absolute speed which is same for all observers regarding the…

Q: Suppose an astronaut is moving relative to the Earth at a significant fraction of the speed of…

A: The astronaut is moving relative to the earth. So, the earth is also moving relative to the…

Q: A rocket is being launched. After a while, it rises at a constant velocity of 50 miles per second.…

A: Draw the free-body diagram of the system.

Q: Why is it impossible for any object with mass to move as fast as the speed of light?

A: Write the Einstein’s equation for the relation of energy and mass of a particle. From the above…

Q: A particle travels at 1.90×108 m/s and lives 2.10×10−8 s when at rest relative to an observer. How…

A:

Q: Choose the option from each pair that makes the following statement correct. Because y for an object…

A: Lorentz factor for an object in relative motion is always greater than one.So option (a) is correct.

Q: Two rockets of rest length 3m are the approaching the carth from opposite direction at velocities 15…

A: Given data, Rest length of each rocket = 3 m Velocity of each rocket = 1.5x108 m/s

Q: The speed of light in water is less than c. Why doesn’t this violate the speed of light postulate?

A: We need to explain how does speed of light in water being less than c, not violate the speed of…

Q: If a flashing light source moves toward you fast enough so that the duration between flashes is half…

A: It is given that a flashing light source is moving towards us such that the duration between the…

Q: Do the relativity equations for time, length, and momentum hold true for everyday speeds? Explain.

A:

Q: Choose the BEST answer to the following: To say thatE=mc2 is to say that energy (a) increases as the…

A: As per the energy mass equivalence equation, the mass of the object can be converted into energy and…

Q: The time observed by the observer on Earth is longer than the time observed by the observer on the…

A: Required : Time observed by the observer on Earth is longer than the time observed by the observer…

Q: 2. A 1.2 kilometer - long train is travelling at a speed of 100 mi/hr. How long is the train as…

A: The speed of the train in m/s is:

Q: How do the effects of special relativity alone cause a clock held by an observer on the surface of…

A: According to special relativity theory inertial observer determines that all clocks in motion…

Q: Calculate the kinetic energy and momentum of a proton traveling 2.9x108m/s.(p=mv/√1 − (?)2 )

A:

Q: Two events that happen at different positions x1 and x2 but at the same time t1 = t2, as measured in…

A:

Q: Why do astronomers looking at distant galaxies talk aboutlooking backward in time?

A:

Q: Jane and Bob see each other when 100 m apart. They are moving toward each other, Jane at speed…

A: Assume that the Jane and Bob are moving along the x-axis

Q: A 135m long steel beam is moving past the Earth actually measures the steel beam to be only 57m…

A: Given a 135m long steel beam is moving past the Earth actually measures the steel beam to be only…

Q: At what relative velocity is Ƴ = 1.50 ?

A: Ƴ = 1.50

Q: The spaceship Lilac, based on the Purple Planet, is779 m long when measured at rest. When the Lilac…

A: The Lilac is moving at speed of 0.369c wit respect to Earth.

Q: If two lightning bolts hit exactly the same place at exactly the same time in one frame of…

A: The condition for the time dilation is, Here, Δt is the time interval measured by the moving…

Q: If you were in a smooth-riding train with no windows, could you sense the difference between uniform…

A: The difference between uniform motion and rest will not able to understand when a person in a smooth…

Relativistic Energy and Momentum

According to classical physics, time flow is the same for every observer. But according to einstein's theory, time flow is different for different observers. The idea that time flow is not the same for all may sound strange because we may not experience this effect in everyday life. This effect is only observed when an object moves with some velocity comparable to the velocity of light. This velocity is termed relativistic velocity.