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Chapter 9: Q76P (page 253)
A 6090 kgspace probe moving nose-first toward Jupiter at 105 m/srelatives to the Sun fires its rocket engine, ejectingof exhaust at a speed of 253 m/srelatives to the space probe. What is the final velocity of the probe?
Final velocity of the probe is 108m/s.
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Figure 9-32: A block on a horizontal floor is initially either stationary, sliding in the positive direction of an x-axis, or sliding in the negative direction of that axis. Then the block explodes into two pieces that slide along the x-axis. Assume the block and the two pieces form a closed, isolated system. Six choices for a graph of the momenta of the block and the pieces are given, all versus time t. Determine which choices represent physically impossible situations and explain why.
A railroad car moves under a grain elevator at a constant speed of . Grain drops into the car at the rate of. What is the magnitude of the force needed to keep the car moving at constant speed if friction is negligible?
A shell is shot with an initial velocityof , at an angle of with the horizontal. At the top of the trajectory, the shell explodes into two fragments of equal mass (Fig.9-42). One fragment, whose speed immediately after the explosion is zero, falls vertically. How far from the gun does the other fragment land, assuming that the terrain is level and that air drag is negligible?
Figure 9-73 shows an overhead view of two particles sliding at constant velocity over a frictionless surface. The particles have the same mass and the same initial speed V = 4.00 m/s, and they collide where their paths intersect. An xaxis is arranged to bisect the angle between their incoming paths, such that. The region to the right of the collision is divided into four lettered sections by the xaxis and four numbered dashed lines. In what region or along what line do the particles travel if the collision is (a) completely inelastic, (b) elastic, and (c) inelastic? What are their final speeds if the collision is (d) completely inelastic and (e) elastic?
A2100 KGtruck travelling north at 41 km/h turns east and accelerates to 51 km/h. (a) What is the change in the truck鈥檚 kinetic energy? What are the (b) Magnitude and (c) Direction of the change in its momentum?
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