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In the figure here, a red car and a green car move toward each other in adjacent lanes and parallel to an x axis. At time t = 0, the red car is at xr = 0 and the green car is at xg = 221 m. If the red car has a constant velocity of 29.0 km/h, the cars pass each other at x = 43.0 m. On the other hand, if the red car has a constant velocity of 58.0 km/h, they pass each other at x = 76.9 m. What are (a) the initial velocity (in km/h) and (b) the (constant) acceleration (in m/s2) of the green car? Include the signs.
A rabbit runs in the straight line with a velocity of +1.6 m/s for a period of time, rests for 12 s, and then runs again along the equivalent line at +0.52 m/s for an unidentified amount of time. The rabbit travels the total distance of 1224 m, and i..
Assume air resistance is negligible; from what height (in cm) above the compressed spring was the block dropped.
On a highly polished, essentially frictionless lunch counter, a 0.500 kg submarine sandwich moving 3.00 m/s to the left collides with an 0.250 kg grilled cheese sandwich moving 1.20 m/s to the right. How much mechanical energy dissipates in the col..
A divers lungs hold 0.0050 m^3 of air at sea level, where the pressure is 101.3 kPa. what is the volume of the air in his lungs at a depth of 3 m
A mortar* crew is positioned near the top of a steep hill. Enemy forces are charging up the hill and it is necessary for the crew to spring into action. How fast will the shell be traveling when it hits the ground
An object is accelerated by a force. If the acceleration increases by a factor 2 and the mass increases by a factor 4, by what factor was the force increased
A bar of length 2 cm slides along metal rails at a speed of 1 cm/s. The bar and rails are in a magnectic field of 2 T, pointing out of the page. what is the induced emf in the bar and rails
Two satellites are in circular orbits around a planet that has radius 9.00×10^6m. What is the orbital speed of the second satellite
A proton has a speed of 0.80c.Calculate the rest energy of the proton. Calculate the total energy of the proton
A fox fleeing from a hunter encounters a 0.690 m tall fence and attempts to jump it. By how much does the fox clear the fence
copper has 8.5 x 10^28 electrons per cubic meter. if a current of 1.55 A is flowing in the wire, what is the average drift speed of the electrons along the wire
A 107-kg horizontal platform is a uniform disk of radius 1.85 m and can rotate about the vertical axis through its center. Find the moment of inertia of this system, consisting of the platform and its population, with respect to the axis
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