A 0.017-kg bullet is fired into a stationary block of wood of mass of 5.5 kg. The relative speed of the bullet with respect to the wood is zero after collision (The bullet becomes embedded on the block of wood). If the speed of the bullet before collision is 477 m/s, what is the kinetic energy of the bullet-plus-wood combination right after the collision? Assume no change in the potential energy of the system before and after the collision. Express your answer in two decimal places, in Joules.

The mechanical energy (kinetic+potential) of the system of two colliding objects on a horizontal frictionless surface is conserved. This statement is O Always true for any collision O more information is needed O Always false for any collision

In the figure here, a stationary block explodes into two pieces L and R that slide across a frictionless floor and then into regions with friction, where they stop. Piece L, with a mass of 2.1 kg, encounters a coefficient of kinetic friction µ = 0.60 and slides to a stop in distance d₁ = 0.38 m. Piece Rencounters a coefficient of kinetic friction UR = 0.41 and slides to a stop in distance dp = 0.43 m. What was the mass of the block? Number -HL |d₂| Unit -μ=0 -HR -dr-

You push a box of mass 21.4 kg with your car up to an icy hill slope of irregular shape to a height 5.1 m. The box has a speed 13.3 m/s when it starts up the hill, the same time that you brake. It then rises up to the top (with no friction) to a flat area before elastically colliding with a smaller box of mass 14 kg. The boxes then fall off a sheer cliff individually to the ground (with no drag). (a) How far from the cliff does the heavier box hit the ground? (b) What is the direction of motion of the heavier box as it hits the ground? = ŷ + 2 (c) How far from the cliff does the lighter box hit the ground? (d) What is the direction of motion of the lighter box as it hits the ground? W = ŷ + 2

Current Attempt in Progress In the figure here, a stationary block explodes into two pieces L and R that slide across a frictionless floor and then into regions with friction, where they stop. Piece L, with a mass of 3.3 kg, encounters a coefficient of kinetic friction u = 0.45 and slides to a stop in distance d = 0.33 m. Piece R encounters a coefficient of kinetic friction µr = 0.52 and slides to a stop in distance de = 0.46 m. What was the mass of the block? HR – di Up Number i Unit eTextbook and Media GO Tutorial Save for Later Attempts: 0 of 8 used Submit Answer étv 80 DD F2 F3 F4 F6 FZ F8 F9 F10 F11 F5

A 0.015-kg bullet is fired into a stationary block of wood of mass of 5.2 kg. The relative speed of the bullet with respect to the wood is zero after collision (The bullet becomes embedded on the block of wood). If the speed of the bullet before collision is 462 m/s, what is the kinetic energy of the bullet plus-wood combination right after the collision? Assume no change in the potential energy of the system before and after the collision. Express your answer in two decimal places, in Joules.