A 28,000 kg freight car is coasting at 0.650 m/s with negligible friction under a hopper that dumps 120,000 kg of scrap metal into it.
(a)What is the final velocity (in m/s) of the loaded freight car? (Enter the magnitude.)
__________m/s
How much kinetic energy (in J) is lost?
___________ J
A 28,000 kg freight car is coasting at 0.650 m/s with negligible friction under a hopper...
it. A 24,000 kg freight car is coasting at 0.800 m/s with negligible friction under a hopper that dumps 150,000 kg of scrap (a) What is the final velocity (in m/s) of the loaded freight car? (Enter the magnitude.) metal into m/s (b) How much kinetic energy (in J) is lost?
A 40000 kg freight car is coasting at a speed of 5.0 m/s along a straight level track when it strikes a 30000.kg stationary freight car and couples to it. What will be their combined speed after impact? 2.9 m/s O 3.3 m/s O 3.5 m/s O 3.7 m/s
A 10 ton freight car (call it car A) is moving at 4 m/s
collided with a 30 ton freight car (call it car B), initially at
rest. After the collision, they are stuck together. Assume the
rolling friction of the cars is negligible
please help woth number 6. please show all work and all of the
equations used.
final momenta? 6. (18 points) A 10 ton freight car (call it car A) moving at 4 m/s collides with a...
Two identical freight cars roll toward one another, on a level track with negligible friction.One car is moving at 2.3 m/s and the other car at 2.9 m/s. After the collision, both cars are coupled and roll together with what speed? How much kinetic energy islost in this collision? ***I get 0.3 as my velocity but Im not sure how to calculate how much kinetic energy is lost in this collision
Q1 A small object with a momentum of magnitude 2.71 kg m/s approaches head-on a large object at rest. The small object bounces straight back with a momentum of magnitude 6.19 kg m/s. What is the magnitude of the small object's momentum change in kg m/s? Q2 A force acts on a 4.708 kg mass as follows: the force starts at zero and rises to 60.334 N linearly in 2.24 seconds, it remains at 60.334 N for another 5.756 seconds,...
A 5000-kg freight car rolls along rails with negligible friction. The car is brought to rest by a combination of two coiled springs as illustrated in the figure below. Both springs are described by Hooke's law and have spring constants with k1 = 1500 N/m and k2 = 3500 N/m. After the first spring compresses a distance of 28.5 cm, the second spring acts with the first to increase the force as additional compression occurs as shown in the graph....
In an ice show a 65.0 kg skater leaps into the air and is caught by an initially stationary 70.0 kg skater. (a) What is their final velocity assuming negligible friction and that the leaper's original horizontal velocity was 4.00 m/s? (b) How much kinetic energy is lost? J
A 1200 kg car is coasting on a horizontal road with a speed of 18 m/s . After passing over an unpaved, sandy stretch 35.0 m long, car's speed has decreased to 12 m/s . Part A Was the net work done on the car positive, negative, or zero? Part B Find the magnitude of the average net force on the car in the sandy section of the road. Express your answer to two significant figures and include the appropriate...
A loaded ore car has a mass of 915 kg and rolls on rails with negligible friction. It starts from rest and is pulled up a mine shaft by a cable connected to a winch. The shaft is inclined at 26.5° above the horizontal. The car accelerates uniformly to a speed of 2.20 m/s in 12.0 s and then continues at constant speed. (a) What power must the winch motor provide when the car is moving at constant speed? W...
A 900-kg car traveling east at 15.0 m/s collides with a 750-kg car traveling north at 20.0 m/s. The cars stick together. Assume that any other unbalanced forces are negligible. a. What is the speed of the wreckage just after the collision? b. In what direction does the wreckage move just after the collision? c. How much kinetic energy is lost in this collision.