Dynamics-Self Assessment Tutorial-2

Dynamics-Self - DYNAMICS(continued • Kinetics of a Particle Impulse and Momentum •(15.1 Principle of Linear Impulse and Momentum 1 The force F

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Unformatted text preview: DYNAMICS (continued) • Kinetics of a Particle: Impulse and Momentum • (15.1) Principle of Linear Impulse and Momentum 1) The force F acts for 2 s. Compute the magnitude of the impulse given to the 10-kg block. I = ? One answer only. 20 Ns 35 Ns 40 Ns None of the above 2) The force F acts for 2 s. Compute the magnitude of the impulse given to the 10-kg block. I = ? One answer only. 5 Ns 15 Ns 20 Ns None of the above 3) Compute the magnitude of the block's linear momentum when the block is at point A. The block has a mass of 10 kg and moves along the vertical curved path with a constant speed of 2 m/s. L A = ? One answer only. 17 kg.m/s 20 kg.m/s 25 kg.m/s None of the above 4) cont....What is the magnitude of the linear momentum of the block when it is at point B? L B = ? One answer only. 5 15 25 None of the above 5) The 2 kg block is moving to the right at 10 m/s when it is acted upon by the 10-N force. If the surface is smooth, determine the time needed to stop the block. t = ? One answer only. 2 s 3.5 s 4.5 s None of the above 6) The 10 kg block is sliding down the plane at 2 m/s when it is at A. Select the equation which represents a reduced form of the principle of impulse and momentum in the x direction for the time period t = 2 s. The coefficient of kinetic friction between the block and plane is µ = 0.4. One answer only. 20 - 0.8 N A = 10 v 118.1 - 0.8 N A = 10 v None of the above 7) The 10 kg ball rolls to the left at 3 m/s, it strikes the wall and bounds back and rolls to the right at 2 m/s. If the contact time is 0.1 s, determine the average impulsive force which the wall exerts on the ball. F = ? One answer only. 100 N 200 N 300 N 500 N None of the above 8) The 10 kg block is moving to the right at 3 m/s when it is acted upon by the force F which varies as shown. Select the equation that represents a reduced form of the principle of impulse and momentum in the x direction during the time period t = 5 s. The coefficient of kinetic friction between the block and the plane is µ K = 0.4. One answer only. 90 - 2 N A = 10v 110 - 2 N A = 10v 10 + 2 N A = 10v None of the above • (15.2-15.3) Conservation of Linear Momentum 1) Blocks A and B have a mass of 10 kg and 20 kg, respectively. If they are travelling with the speeds shown, determine their common velocity if they collide and become coupled together. v = ? One answer only. 2 m/s to right 2 m/s to left 3.33 m/s to left 4 m/s to left None of the above 2) A spring is placed between the 10-kg block A and the 20-kg block B. The blocks are then pushed together so as to compress the spring and then released from rest. When they "fly" apart it is observed that B travels at 3 m/s to the right. Determine the velocity of block A. The spring is not connected to the blocks and its mass can be neglected....
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This note was uploaded on 06/18/2009 for the course CE xxx taught by Professor Tuken during the Spring '09 term at Middle East Technical University.

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Dynamics-Self - DYNAMICS(continued • Kinetics of a Particle Impulse and Momentum •(15.1 Principle of Linear Impulse and Momentum 1 The force F

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