5.10 kg squid initially at rest ejects 0.250 kg of fluid with a velocity of 10.8 m/s. What is the recoil velocity (in m/s) of the squid if the ejection is done in 0.100 s and there is a 5.05 N frictional force opposing the squid's movement? (Enter the magnitude.) B)How much

A 15-g bullet is shot vertically into an 2-kg block. The block lifts upward 8.0 mm (see the figure). The bullet penetrates the block and comes to rest in it in a time interval of 0.0010 s. Assume the force on the bullet is constant during penetration and that air resistance is negligible. The initial kinetic energy of the bullet is closest to 171 0.0012 J. O 21 J. O 0.16 J.

Problem: You are lead engineer on the design of a crash test apparatus that verifies collisions of varying types. A m = 2 kg mass, when suspended above from a light-weight wire of L = 1.5 m, is first released at an angle of 90°, and correspondingly a height h = L. The tethered ball swings toward the waiting block of M = 4 kg. collides, then rebounds back to an angle of 0 = 32°. In this case, the collision between m and M is elastic, which prompts M's rightwards motion a distance of Ax = 2.1 m, from which the coefficient of kinetic friction between the block and surface on which it is slid is determined. m L h 0 M

A 1200-kg car traveling initially with a speed of 25.0 m/s in an easterly direction crashes into the rear end of a 9 000-kg truck moving in the same direction at 20.0 m/s (Fig. P6.44). The velocity of the car right after the collision is 18.0 m/s to the east. (a) What is the velocity of the truck right after the collision? (b) How much mechanical energy is lost in the colli- sion? Account for this loss in energy. +20.0 m/s +25.0 m/s +18.0 m/s Before After Figure P6.44

A 3.30-kg steel ball strikes a wall with a speed of 11.0 m/s at an angle of 0 = 60.0° with the surface. It bounces off with the same speed and angle (see figure below). If the ball is in contact with the wall for 0.200 s, what is the average force exerted by the wall on the ball? (Assume right and up are the positive directions.) Fx N Fy y

In a circus act, a 55.5 kg clown with 2.5 m/s horizontal velocity jumps into the air and is caught by a 72.5 kg clown who was initially at rest. The clown is sitting on a sheet of ice, and moves off at some new velocity, after the two clowns are stuck together. How much kinetic energy is lost during this process? Options for answers: 98.2 J 348.6 J 18.9 J 0 J

Consider a system of two particles in the xy plane: m₁ has velocity (3.001 - 2.00ĵ) m/s. This answer has not been graded yet. (a) Plot these particles on a grid or graph paper. Draw their position vectors and show their velocities. (Include the center of mass of the system and its velocity found below. Submit a file with a maximum size of 1 MB.) Choose File No file chosen (b) Find the position of the center of mass (in m) of the system and mark it on the grid. XCM усм Vx,CM Vy,CM = m 2.20 kg is at the location ₁ = (1.00Î + 2.00ĵ) m and has a velocity of (3.00î + 0.500ĵ) m/s; m₂ = 1 m Px Py (c) Determine the velocity of the center of mass (in m/s) and also show it on the diagram. m/s m/s (d) What is the total linear momentum of the system (in kg • m/s)? kg. m/s kg. m/s 3.50 kg is at r₂ = (-4.00î – 3.00ĵ) m and

The US 16” MK 7 naval gun fires a 1225 Kg shell at a muzzle velocity of 760 m/s. The mass of the gun and breech is 121 500 Kg. Assume the gun is fired horizontally. a)  What is the recoil speed of the gun? b)  What are the final kinetic energies of the gun and shell? c)  The recoil is damped by a combination of springs and hydraulic cylinders that can be modeled as one large spring as shown below. If the recoil distance is 1.12 m, what is the spring constant of the damping system?

A 38.0-kg boy, riding a 1.90-kg skateboard at a velocity of 5.60 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, 9.60° 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.

Problem 5: A 1.8 kg falcon catches a 0.65 kg dove from behind in midair. What is the speed of the pair of birds right after the catch if the falcon's initial speed was 28 m/s, the dove's initial speed was 7 m/s, and they were moving in the same direction?