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A railroad car with a mass of 11600 kg collides and couples with a second car of mass 18600 kg that is initially at rest. The first car is moving with a speed of 8.7 m/s prior to the collision. If external forces can be ignored, what is the final velocity of the two railroad cars after they couple?
Andy and Brad are lifting a 100 kg box to their apartment window using massless ropes. The ropes are tied to the same point on the box, Find the tensions in each rope.
An automobile has a total mass of 1700 kg. It accelerates from rest to 40 km/h in 10 s. Assume each wheel is a uniform 32 kg disk. find the total kinetic energy of the automobile
A stone is dropped from a cliff; 2.08 s later another stone is thrown downward with an initial speed of 31 m/s. Find the height of the cliff
A racing car of mass 950 kg accelerates from rest with an acceleration of 3.9 m/s^2 for 7.5 s. What is the net work done by the car
A 1480{\rm kg} car pulls a 320{\rm kg} trailer. The car exerts a horizontal force of 3900{\rm N} against the ground in order to accelerate. What force does the car exert on the trailer
A skier with a mass of 59 kg starts from rest and skis down an icy (frictionless) slope that has a length of 44 m at an angle of 32° with respect to the horizontal.
a drawbridge with a weight of 5000 n is supported by a hinge and rope and is in static equilibrium. the length of the drawbridge, l, is 5 meters, what is the tension force the rope provides
How will their speeds to relate to each other when they land? Ignore air resistance. Clarify with graph. Draw a graph and explain why it happens.
The skis have a thrust of 190 . Sam's speed at the bottom is 35.0 . Illustrate what is the coefficient of kinetic friction of his skis on snow?
What is the tension in the rope connecting the two boxes? What is the tension in the rope connecting the first box to the ramp?
A spaceship moves past you at speed v. You calculate the ship to be 364 m long, whereas an astronaut on the ship measures a length of 420 m. Find v.
Two Resistors of R1 = 3.23 ohm and R2 = 5.95 ohm are connecred in series to a battery whith an EMF of 24.0 v, Find the current I1 through the first resister
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