In SI units, a truck of mass 25,000 kg is travelling at 100 km/hr, which is a bi

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In SI units, a truck of mass 25,000 kg is travelling at 100 km/hr, which is a bit over 60 mph? What is the truck's kinetic energy in SI units? What is the truck's kinetic energy in SR energy units? 2. (5 points) In any system, the unit of acceleration is the unit the unit of velocity divided by the unit of time. So, in SR units the unit of acceleration must be s since in SR units velocity is dimensionless. What is the acceleration in SI units of an object whose acceleration in SR units is 1 s1? For comparison, recall that the acceleration due to gravity in SI units is about 10 m/s2 3. (6 points) Draw a 2-d spacetime diagram that shows the following a) the worldline of a particle traveling at a constant speed of 3/5 in the -x direction that passes the location x0s at timet-2s. b) the worldline of a particle that at t = 0s is at rest at x 0s but accelerates in the x direction eventually approaching the speed of light. c) the worldline of a light pulse that passes x-0s at t 3s traveling in the-x direction. 4. (8 points) You and a colleague are on two spaceships with engines off far from any other objects and at rest relative to each other. You have a clock, a telescope and a powerful strobe light. At precisely 12:00:00 noon according to your clock you flash your strobe light. Precisely 30s later you see through your telescope the face of your colleague's clock, identical to yours, illuminated by the pulse of light emitted by your strobe light. How far away is your colleague's ship (in seconds and in meters)? Assuming your clock's are synchronized, what time did your colleague's clock read at the instant you saw it. Explain your reasoning briefly but clearly 5. (6 points) A space station is at rest at location x0s in an inertial coordinate system when passed at time t0s by a spaceship traveling at speed 2/5 in the x direction. Call that event A. At t 125s the ship emits a pulse of light that travels back toward the station. Call that event B and the reception of that pulse at the station event C Draw a spacetime diagram showing the worldliness of the station, the ship and the light pulse, each clearly labeled. Also clearly label the events A, B and C and the t and x coordinates of those events.

Explanation / Answer

(2). accelaration = 1 s-1 in SR unit

accelaration = c * 1 s-1 in SI unit = 3 * 108 m/s2

(4) So time taken by light from my spaceship to other spaceship is 15 sec

so distance is d = c * 15 = 3 * 108 * 15 = 15 * 108 meter

the other cloack time is 12:00:15

but my clock time is 12:00:30

pls post other question seperatly

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