Please help me with the following questions.

1.

Part A Block B (mass 8.00 kg) is at rest at the edge of a smooth platform, 2.60 m above the floor. Block A (mass 1.50 kg) is sliding with a speed of 8.00 m/s along the platform toward block B. A strikes B What is the speed of B just before it strikes the floor? and rebounds with a speed of 2.00 m/s. The collision projects B Express your answer with the appropriate units. horizontally off the platform. LLA ? UB = Value Units Submit Request AnswerPart A For related problemsolving tips and strategies, you may want to view a Video Tutor Solution of Momentum versus kinetic energy. What is the magnitude of the momentum of a 12000 kg truck whose speed is 13.0 m/s? Express your answer with the appropriate units. A ? p = Value Units Submit Request Answer Part B What speed would a 2000 kg SUV have to attain in order to have the same momentum? Express your answer with the appropriate units. ? U = Value Units Submit Request AnswerPart A A 3.00 kg stone is sliding to the right on a frictionless horizontal surface at 6.00 m/s when it is suddenly struck by an object that exerts a large horizontal force on it for a short period of time. The What impulse does this force exert on the stone? graph in the figure (Figure 1) shows the magnitude of this force as a Express your answer in kilogram meters per second. function of time. For related problemsolving tips and strategies, you may want to view a Video Tutor Solution of A ball hits a wall. V AED ? J = kg . m/s Submit Request Answer Part B Figure Express your answer in meters per second. F (kN) Vn AED ? U = m/s 2.50 Submit Request AnswerPart A An 8.00 kg block of wood sits at the edge of a frictionless table, 2.40 m above the floor. A 0.550 kg blob of clay slides along the length of the table with a speed of 23.3 m/s, strikes the block of What horizontal distance has the combined object traveled when it reaches the floor? wood, and sticks to it. The combined object leaves the edge of the Express your answer with the appropriate units. table and travels to the floor. ? = Value Units Submit Request AnswerPart A A steel ball with mass 43.0 g is dropped from a height of 2.08 m onto a horizontal steel slab. The ball rebounds to a height of 1.55 m. Calculate the impulse delivered to the ball during impact. Express your answer in newton seconds. AEQ ? N . s Submit Request Answer Part B If the ball is in contact with the slab for a time of 1.50 ms, find the average force on the ball during impact. Express your answer in newtons. VO AEQ ? N Submit Request AnswerPart A A 70 kg astronaut floating in space in a 110 kg MMU (manned maneuvering unit) experiences an acceleration of 0.029 m/s when If the speed of the escaping N2 gas relative to the astronaut is 490 m/s, how much gas is used by the thruster in 5.0 s? he fires one of the MMU's thrusters. Express your answer with the appropriate units. For related problemsolving tips and strategies, you may want to view a Video Tutor Solution of Acceleration of a rocket. ? m = Value Units Submit Request Answer Part B What is the thrust of the thruster? ? F = Value Units Submit Request AnswerV PartA You (mass 55 kg) are riding your frictionless skateboard (mass 5.0 kg} in a straight line at a speed of 4.4 m/s when a friend standing on a balcony above you drops a 3.8 kg sack ofour straight down into your arms. Express your answer with the appropriate units. What is your new speed. while holding the our sack? For related problemsolving tips and strategies, you may want to View a Video Tutor Solution of Collision in a horizontal plane. m v = VaIue Units muest Answer Part A On a frictionless, horizontal air table, puck A (with mass 0.250 kg) is moving toward puck B (with mass 0.360 kg), that is initially at rest. What was the speed of puck A before the collision? After the collision, puck A has a velocity of 0.124 m/s to the left, Express your answer in meters per second. and puck B has velocity 0.660 m/s to the right. For related problem-solving tips and strategies, you may want to view a Video Tutor Solution of Collision along a straight line. AEd 1 ? v = 15.845 m/s Submit Previous Answers Request Answer X Incorrect; Try Again; 5 attempts remaining V Part B Calculate the change in the total kinetic energy of the system that occurs during the collision. Express your answer in joules. AED ? AK = Submit Request AnswerPart A The expanding gases that leave the muzzle of a rifle also contribute to the recoil. A.30 caliber bullet has mass 7.20x10- kg and a speed of 601 m/s relative to the muzzle when fired from a rifle that Find the momentum of the propellant gases in a coordinate system attached to the earth as they leave the muzzle of the rifle. has mass 3.10 kg. The loosely held rifle recoils at a speed of Express your answer in kilogram meters per second. 1.85 m/s relative to the earth. For related problem-solving tips and strategies, you may want to AEd ? view a Video Tutor Solution of Recoil of a rifle. P= 4.314 kg . m/s Submit Previous Answers Request Answer X Incorrect; Try Again; 5 attempts remainingPart A You are called as an expert witness to analyze the following auto accident: Car B, of mass 2000 kg, was stopped at a red light when it was hit from behind by car A, of mass 1300 kg. The cars locked What was the speed of car A just before the collision? bumpers during the collision and slid to a stop. Measurements of the Express your answer in miles per hour. skid marks left by the tires showed them to be 7.25 m long, and inspection of the tire tread revealed that the coefficient of kinetic friction between the tires and the road was 0.65. VO AEd ? U = mph Submit Request Answer Part B By how many mph was car A exceeding the speed limit 35 mph? Express your answer in miles per hour. AEd ? Av = mph Submit Request