A 5.50 g bullet moving at 980 m/s strikes a 510 g wooden block at rest on a frictionless surface. The bullet emerges, traveling in the same direction with its speed reduced to 496 m/s. (a) What is the resulting speed of the block? (b) What is the speed of the bullet-block center of mass?

A 44.0-kg boy, riding a 2.80-kg skateboard at a velocity of 5.30 m/s across a level sidewalk, jumps forward to leap over a wall. Just after leaving contact with the board, the boy's velocity relative to the sidewalk is 6.00 m/s, 7.60° above the horizontal. Ignore any friction between the skateboard and the sidewalk. What is the skateboard's velocity relative to the sidewalk at this instant? Be sure to include the correct algebraic sign with your answer. Number i Units Vo V12 The

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A 19.0 kg curling stone is travelling at 3.0 m/s [N] along the smooth ice when it hits an opponent’s stone that is at rest.  (Both stones have the same mass.)  The opponent’s stone rolls off at a velocity of 1.8 m/s [N 22° W]. Determine the percentage of kinetic energy lost during the collision and comment on how close this collision is to being elastic.

Sally finds herself stranded on a frozen pond so slippery that she can't stand up or walk on it. To save herself, she throws one of her heavy boots horizontally, directly away from the closest shore. Sally's mass is 64.0 kg, the boot's mass is 5.00 kg, and Sally throws the boot with speed equal to 26.5 m/s. For all parts, assume the ice is frictionless and Ihat the positive direction is towards the shore. What is Sally's speed vs immediately after throwing the boot? -2.07 m/s Us = What is the displacement Aro of the center of mass of the Sally-boot system, relative to where she threw the boot, after AF = 2.75 10.0 s? How much time i does it take Sally to reach the shore, a distance of 30.0 m away from where she threw the boot? 14,49

A 1200-kg pick up truck traveling south at 15 m/s suddenly collided with a 750-kg car that is traveling east. The two vehicles stick together and slide along the road after colliding. A highway patrol officer investigating the accident determines that the final position of the wreckage after the collision is 25 m, at an angle of 50° south of east, from the point of impact. She also determines that the coefficient of kinetic friction between the tired and the road at that location was 0.40. What was the speed of the car just before the collision?

In the figure, block 1 of mass m1 slides from rest along a frictionless ramp from height h = 2.4 m and then collides with stationary block 2, which has mass m2 = 4m1. After the collision, block 2 slides into a region where the coefficient of kinetic friction ug is 0.1 and comes to a stop in distance d within that region. What is the value of distance d if the collision is (a) elastic and (b) completely inelastic? Frictionless (a) Number Unit (b) Number i Unit

A cue ball initially moving at 2 m/s strikes a stationary eight ball of the same size and mass. After the collision, the cue ball's final speed is 1 m/s at an angle of 0 with respect to its original line of motion. О Before 2 m/s 1 m/s 0 After Find the eight ball's speed after the col- lision. Assume an elastic collision (ignoring friction and rotational motion). Answer in units of m/s. Answer in units of m/s.

Two blocks of masses m, = 4.00 kg and m, = 8.00 kg are each released from rest at a height of 5.00 m on a frictionless track, as shown in the figure, and undergo an elastic head-on collision. Find the maximum height to which block m, rises after the collision. т т2 5.00 m 5.00 m

A 156 g cart moves on a horizontal, frictionlesssurface with a constant speed of 11.1 cm/s.A 60.6 g piece of modeling clay is droppedvertically onto the cart.If the clay sticks to the cart, find the finalspeed of the system.Answer in units of cm/