An object at rest is suddenly broken apart into fragments A and B by an explosion. The fragment A acquires six times the kinetic energy of the fragment B. What is the ratio of their masses? Express your answer using two significant figures.
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An object at rest is suddenly broken apart into fragments A and B by an explosion. The fragment A acquires six times the kinetic energy of the fragment B.
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- Marble A was released at a certain height of the ramp and hit Marble B on the horizontal end of the ramp. Both Marbles A and B weighs 5 grams. The horizontal distances covered by marbles A and B after the collision are 5 cm and 35 cm, respectively. The elevation from the edge of the ramp to the ground is 15cm. Assuming that energy and momentum are conserved, what is initial potential energy (in erg; erg = dyne.cm) of Marble A? Use g=980cm/s2. Round off your answer to two decimal places. Answer correctly, thank you.In the figure below, a 3.1 kg box of running shoes slides on a horizontal frictionless table and collides with a 1.8 kg box of ballet slippers initially at rest on the edge of the table, at height = 0.40 m. The speed of the 3.1 kg box is 5.0 m/s just h before the collision. If the two boxes stick together because of packing tape on their sides, what is their kinetic energy just before they strike the floor? ។ hA 1980 kg truck traveling north at 37 km/h turns east and accelerates to 53 km/h. (a) What is the change in the truck's kinetic energy? (b) What is the magnitude of the change in its momentum?
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