A 1960 kg truck traveling north at 30 km/h turns east and accelerates to 54 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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- 2) A rocket is shot straight up to a height of 120.0 m where it explodes causing the rocket to split into two parts that weigh ma=2.40 kg and me=0.55 kg respectively. 1380 J of chemical energy was transformed into kinetic energy of the two parts (i.e., 1380 J= KA + Kg). a) What is the speed of each part, vA and vB, just after the explosion? b) What is the time taken for the parts to reach the ground after the explosion?(It is observed that the two parts hit the ground at the same time) c) What is the distance between the points on the ground (d) where they land? (Assume that the ground level and neglect air resistance). Object B Object A VA and ma Va and ma h= 120.0 mA 2350 kg truck traveling north at 43 km/h turns east and accelerates to 61 km/h. (a) What is the change in the truck's kinetic energy? (b) What is the magnitude of the change in its momentum? (a) Number i Units (b) Number Units kg-m/s or N-sA teacher attending a meeting decided to check what would happen with kinetic mercy if she changed the momentum. She decided to conduct an experiment using a dynamics cart. The student measured the speed of the cart as she released it from inclined surfaces with different slopes. She was able to increase the momentum by a factor of 17. By what factor did the kinetic energy change.
- 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.A 2.0-kg object moves to the right with a speed of 4.0 m/s. It collides in a perfectly elastic head-on collision with a 5.0-kg object at rest. (a) What is the total kinetic energy after the collision? (b) What is the speed of the 2.0-kg object after the collision? (c) What is the speed of the 5.0-kg object after the collision?A 2180 kg truck traveling north at 33 km/h turns east and accelerates to 58 km/h. (a) What is the change in the truck's kinetic energy? (b) What is the magnitude of the change in its momentum? (a) Number (b) Number Units Units V 27
- oes every moving body posses both kinetic energy and momentum? Explain.A railroad car of mass 2.55 104 kg is moving with a speed of 3.94 m/s. It collides and couples with three other coupled railroad cars, each of the same mass as the single car and moving in the same direction with an initial speed of 1.97 m/s. (a) What is the speed of the four cars after the collision? (Round your answer to at least two decimal places.) (b) How much mechanical energy is lost in the collision?Give handwritten answer