A cruise ship going across a lake 15km wide travels a distance of 6km at a certain speed and then finishes the trip at a speed 1 kph slower than its original speed. The boat arrives 20 minutes later than if the original speed is maintained throughout the trip. What is the original speed of the cruise ship?

Q: What must be the speed of an electron for its relativistic kinetic energy to be equal to its rest…

A: The relativistic kinetic energy (KE) of the electron is equal to the rest energy (E).

Q: An electron is moving in circular motion with uniform speed 0.95 c, where c is the speed of light in…

A: Velocity of electron= 0.95 c

Q: What is the speed of a particle whose kinetic energy is equal to (a) its rest energy and (b) five…

A: (a) The expression of kinetic energy is given by, Ek=mc211-v2c2-1...…(1) Here, m is the mass of the…

Q: A light flashes at position x = 0 m. One microsecond later, a light flashes at position x = 1000 m.…

A: In first reference frame S, Spatial interval of the event, ∆x=1000 m-0 m      =1000 m   Temporal…

Q: An object moving with a speed of 6.25 m/s, is decelerated at a rate given By dv dt= −2.5√v where v…

A: Given value--- An object moving with a speed of 6.25 m/s, is decelerated at a rate given By dv dt=…

Q: Give a physical argument that shows it is impossible to accelerate an object of mass m to the speed…

A: Light is the universal speed limit. Nothing can exceed the speed of light.The force should produce…

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 particle travels at 1.90 x 108 m/s and lives 2.10 x 10-8 s when at rest relative to an observer.…

A: The decay time in the rest frame is, The particle’s velocity is,

Q: A spaceship in distress sends out two escape pods in opposite directions. One travels at a speed v1…

A:

Q: Frame A is stationary. A ball is fired in the x-direction with a speed of 5 m/s. If Frame B is…

A: Frame A is stationary. A ball is fired in the x-direction with a speed of 5 m/s. If FrameB is moving…

Q: The kinetic energy of a particle of mass m traveling with speed v is equal to K. What is the kinetic…

A: If m is the mass and v is the velocity ,the kinetic energy K=12mv2 When m=m2 and v=2v ,the new…

Q: A car traveling at 35.0 m/s takes 26.0 minutes to travel a certain distance according to the…

A: Formula used to calculate the time taken for the trip measured by an observer at rest on Earth. is,

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

A: Given:-   The speed of the first escape pod, assuming it is moving towards the right VA = 0.66c The…

Q: Which of the following will NOT occur when observer A moves at a significant fraction of the speed…

A:

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: 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: What happens when observations include velocities close to light speed? To move an object, Newton's…

A: Answer:- (a) To move an object, Newton's second law of motion applies: F = ma.    Because  Newton's…

Q: Beta-decay is nuclear decay in which an electron is emitted from an atom. If the electron is given…

A:

Q: A neutron lives 900 s when at rest relative to an observer.How fast is the neutron moving relative…

A:

Q: A man standing still at a train station watches two boys throwing a baseball in a moving train. The…

A:

Q: The spaceship Lilac, based on the Purple Planet, is 741 m long when measured at rest. When the Lilac…

A: Givenoringinal length (L0) = 741 mcontracted length (L) = 681 m

Q: An electron is moving circular motion with uniform speed 0.95 c, where c is the speed of light in…

A: Given   Radius= 1.2 km  Velocity= 0.95 c

Q: An electron is moving in circular motion with uniform speed 0.95 c, where c is the speed of light in…

A: Given data: Uniform speed, v=0.95 c Speed of light, c=3×108 ms The radius of the circle, r=1.2…

Q: How many minutes Raman will take to cover a distance of 400 meters if he runs at a speed of 20 km/hr…

A:

Q: An electron moves to the right with a speed of 0.90c relative to the laboratory frame. A proton…

A: Given

Q: If an object at rest in a given frame has no potential energy, then it has a)a rest energy of mc2…

A: Potential energy is the energy of an object due to its position with respect to other objects,…

Q: A UFO Strikes across the sky at a speed of 0.90c relative to the earth. A person determines the…

A: Given data: Speed of UFO relative to earth is, v=0.90c. Length of UFO determined during the motion…

Q: Which of the following is true about time dilation? A. The time measured by a moving observer…

A: Time dilation is defined as the time passing slower for an observer who is moving relative to…

Q: As the drawing shows, a carpenter on a space station has constructed a 30.0° ramp. A rocket moves…

A: Length does not contract in the direction perpendicular to the velocity, since there is no relative…

Q: A boat takes 3.50 hours to travel 10.0 km down a river, then 5.40 hours to return.   How fast is the…

A:

Q: A moving spaceship is measured by a stationary observer to have a length that is four-fifths of its…

A: Given, A moving spaceship is measured by a stationary observer to have a length that is four-fifths…

Q: What is the speed of a proton accelerated by a potential difference of 165 MV?

A: Kinetic energy of charge particle accelerated through potential difference is given as follows:…

Q: An extraterrestrial spaceship is moving away from the earth after an unpleasant encounter with its…

A:

Q: A particle moves along the x' axis of frame S' with velocity 0.33c. Frame S' moves with velocity…

A: Given: The speed of the particle with respect to S' is 0.33c.  The speed of the frame S' with…

Q: At the instant that a clock standing next to you reads t = 1.0 μs, you look at a second clock, 300 m…

A: The expression for find time taken by the light to reach the given distance is t=dv

Q: Alight-vear is the distance that light travels in one year. The speed of light is 3.00 x 108 m/s How…

A: Write the equation for the distance travelled by the light in a year. DistanceD=Speed of light ctime…

Q: Which is not an inertial frame?       Earth A stationary frame An accelerated frame A frame moving…

A: A frame of reference is basically a coordinate system in which motion of object is analyzed. There…

Q: A man on the Earth is using a drill whose speed of rotation is 5 revolutions per second. A woman on…

A:

Q: A spaceship passes a space-dock at speed 0.5 c. (A) Its length as measured by the space-dock…

A:

Q: A 20-year-old woman takes a trip on a rocket, leaving her 20-year-old twin brother behind. She…

A: It is given that,