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as always Momentum will be always conserved
carts momentum relative to the floor = ethan's momentum relative to the floor
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Ethan, whose mass is 80 kg, stands at one end of a very long. stationary wheeled...
L College Physics <CH09 HW-9 Problem 9.31 An air-track cart with mass m1 = 0.34 kg...
L College Physics <CH09 HW-9 Problem 9.31 An air-track cart with mass m1 = 0.34 kg and initial speed vo = 0.95 m/s collides with and sticks to a second cart that is at rest initially. Part A If the mass of the second cart is m2 0.50 kg, how much kinetic energy is lost as a result of the collision? Express your answer to two significant figures and include appropriate units. HA ? Value Units Previous Answers Submit Request...
Each ball has a negligible size and a mass of 14.5 kg and is attached to...
Each ball has a negligible size and a mass of 14.5 kg and is attached to the end of a rod whose mass may be neglected. The rod is subjected to a torque Part A M (t2 2) N.m, where t is in seconds. Each bal has a speed v 2 m/s when t 0. (Figure 1) Determine the speed of each ball when t-3 s Express your answer to three significant figures and include the appropriate units. LA Figure...
it has a speed When the 7-kg box reaches point VA = 13 m/s. (Figure 1)...
it has a speed When the 7-kg box reaches point VA = 13 m/s. (Figure 1) Part A Determine the normal force the box exerts on the surface when it reaches point B. Neglect friction and the size of the box. Express your answer to three significant figures and include the appropriate units. Figure < 1 of 1 I Å O2 ? N N = = Value N Submit Previous Answers Request Answer x1/2 + yl/2 = 3 X Incorrect;...
Phys201-1 Summer2020 <A HW (Part 1)Phys201 Problem 7.79 A block of mass m = 2.70 kg...
Phys201-1 Summer2020 <A HW (Part 1)Phys201 Problem 7.79 A block of mass m = 2.70 kg starts from the rest and slides down a 300 incline which is 3.60 m high. At the bottom, it strikes a block of mass M-7.50 kg which is at rest on a horizontal surface (Figure 1). (Assume a smooth transition at the bottom of the incline.) The collision is elastic, and friction can be ignored Determine the speed of the block with mass m2.70...
Two blocks with different masses are attached to either end of a light rope that passes...
Two blocks with different masses are attached to either end of a light rope that passes over a light, frictionless pulley suspended from the ceiling. The masses are released from rest, and the more massive one starts to descend. After this block has descended 1.20 m, its speed is 3.00 m/s. Part A If the total mass of the two blocks is 33.0 kg, what is the mass of the heavier block? Express your answer with the appropriate units. HÀ...
Problem 14.32 < 10 of 10 > Review The block has a mass of 0.81 kg...
Problem 14.32 < 10 of 10 > Review The block has a mass of 0.81 kg and moves within the smooth vertical slot. It starts from rest when the attached spring is in the unstretched position at A. SB = 0.15 m. Neglect the size and mass of the pulley. Hint: The work of F can be determined by finding the difference Alin cord lengths AC and BC and using UF=FAL (Figure 1) Part A Determine the magnitude of the...
The 3.0-m-long, 90 kg rigid beam in the following figure is supported at each end. An...
The 3.0-m-long, 90 kg rigid beam in the following figure is supported at each end. An 82 kg student stands 2.0 m from support 1. (Figure 1) Part A How much upward force does the support 1 exert on the beam? Express your answer to two significant figures and include the appropriate units. F = 980 N Submit Previous Answers Request Answer X Incorrect; Try Again; 18 attempts remaining Figure < 1 of 1 > Part B How much upward...
Sam Whose mass is 100 kg stands at the top of a 18-m-high, 120-m-long snow covered...
Sam Whose mass is 100 kg stands at the top of a 18-m-high, 120-m-long snow covered slope, His skis have a coefficient of kinetic friction on snow of 0.06. He uses his poles to get started. then glides down. 1. The value closest to the normal force acting on Sam is a. 729.7 N b. 735.0 N c. 968.9 N d. 980.0 N 2. The net force acting on Sam is a. 37.1 N b. 88.9 N c. 147 N...
Sam, whose mass is 80 kg takes off across level snow on his jet-powered skis. The...
Sam, whose mass is 80 kg takes off across level snow on his jet-powered skis. The skis have a thrust of 200 N and a coefficient of kinetic friction on snow of 0.1. Unfortunately, the skis run out of fuel after only 15 s. What is Sam's top speed? Express your answer to two significant figures and include the appropriate units. How far has Sam traveled when he finally coasts to a stop? Express your answer to two significant figures...
PartA The boy of mass 36 kg is sliding down the spiral slide at a constant...
PartA The boy of mass 36 kg is sliding down the spiral slide at a constant speed such that his position, measured from the top of the chute, has components r 1.5 m 0- (0.7t) rad, and z- (-0.5t) m, where t is in seconds. Neglect the size of the boy. (Figure 1) Determine the τ, θ, z components of force F which the slide exerts on him at the instant t-2 s using scalar notation. Express your answers using...
L College Physics <CH09 HW-9 Problem 9.31 An air-track cart with mass m1 = 0.34 kg and initial speed vo = 0.95 m/s collides with and sticks to a second cart that is at rest initially. Part A If the mass of the second cart is m2 0.50 kg, how much kinetic energy is lost as a result of the collision? Express your answer to two significant figures and include appropriate units. HA ? Value Units Previous Answers Submit Request...
Each ball has a negligible size and a mass of 14.5 kg and is attached to the end of a rod whose mass may be neglected. The rod is subjected to a torque Part A M (t2 2) N.m, where t is in seconds. Each bal has a speed v 2 m/s when t 0. (Figure 1) Determine the speed of each ball when t-3 s Express your answer to three significant figures and include the appropriate units. LA Figure...
it has a speed When the 7-kg box reaches point VA = 13 m/s. (Figure 1) Part A Determine the normal force the box exerts on the surface when it reaches point B. Neglect friction and the size of the box. Express your answer to three significant figures and include the appropriate units. Figure < 1 of 1 I Å O2 ? N N = = Value N Submit Previous Answers Request Answer x1/2 + yl/2 = 3 X Incorrect;...
Phys201-1 Summer2020 <A HW (Part 1)Phys201 Problem 7.79 A block of mass m = 2.70 kg starts from the rest and slides down a 300 incline which is 3.60 m high. At the bottom, it strikes a block of mass M-7.50 kg which is at rest on a horizontal surface (Figure 1). (Assume a smooth transition at the bottom of the incline.) The collision is elastic, and friction can be ignored Determine the speed of the block with mass m2.70...
Two blocks with different masses are attached to either end of a light rope that passes over a light, frictionless pulley suspended from the ceiling. The masses are released from rest, and the more massive one starts to descend. After this block has descended 1.20 m, its speed is 3.00 m/s. Part A If the total mass of the two blocks is 33.0 kg, what is the mass of the heavier block? Express your answer with the appropriate units. HÀ...
Problem 14.32 < 10 of 10 > Review The block has a mass of 0.81 kg and moves within the smooth vertical slot. It starts from rest when the attached spring is in the unstretched position at A. SB = 0.15 m. Neglect the size and mass of the pulley. Hint: The work of F can be determined by finding the difference Alin cord lengths AC and BC and using UF=FAL (Figure 1) Part A Determine the magnitude of the...
The 3.0-m-long, 90 kg rigid beam in the following figure is supported at each end. An 82 kg student stands 2.0 m from support 1. (Figure 1) Part A How much upward force does the support 1 exert on the beam? Express your answer to two significant figures and include the appropriate units. F = 980 N Submit Previous Answers Request Answer X Incorrect; Try Again; 18 attempts remaining Figure < 1 of 1 > Part B How much upward...
Sam Whose mass is 100 kg stands at the top of a 18-m-high, 120-m-long snow covered slope, His skis have a coefficient of kinetic friction on snow of 0.06. He uses his poles to get started. then glides down. 1. The value closest to the normal force acting on Sam is a. 729.7 N b. 735.0 N c. 968.9 N d. 980.0 N 2. The net force acting on Sam is a. 37.1 N b. 88.9 N c. 147 N...
Sam, whose mass is 80 kg takes off across level snow on his jet-powered skis. The skis have a thrust of 200 N and a coefficient of kinetic friction on snow of 0.1. Unfortunately, the skis run out of fuel after only 15 s. What is Sam's top speed? Express your answer to two significant figures and include the appropriate units. How far has Sam traveled when he finally coasts to a stop? Express your answer to two significant figures...
PartA The boy of mass 36 kg is sliding down the spiral slide at a constant speed such that his position, measured from the top of the chute, has components r 1.5 m 0- (0.7t) rad, and z- (-0.5t) m, where t is in seconds. Neglect the size of the boy. (Figure 1) Determine the τ, θ, z components of force F which the slide exerts on him at the instant t-2 s using scalar notation. Express your answers using...
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