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PHYS ( Conservation of Momentum and Energy - 114 Test #3 Chapters 9,10,11)
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[1] (10 pts) A 3.7kg box is sliding across an icy pond with a velocity of 8.0 m/s. A gust of wind exerts a force as shown in the graph at right. What is the final velocity of the box?
[2] (10 pts) A 3.7 kg box is sliding across an icy pond with a velocity of 8.0 m/s to the right. A constant wind gust of strength
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on the box in the direction shown in the figure. When the wind stops^^ F wind^ =^ 4.5 N blows blowing the box’s speed has increased to 9.2 m/s. How far did the box travel while the wind was blowing?
Page [3] (10 pts) A 3.7 kg box is sliding across an icy pond with a velocity of 8.0 m/s in the 2 of 3 PHYS- 114 Test #3 (^) positiveFall (^2007) x - direction. The box explodes into two pieces, m1 = 2.5 kg and m2 = 1.2 kg. After the explosion, the larger piece is moving in the positive x - direction with a speed of 13.5 m/s. What is the velocity (magnitude and direction) of the smaller piece?
[4] (10 pts) Two blocks (m which passes over a couple of massless, frictionless pulleys.A = 0.6 kg and mB = 0.25 kg) are connected by a string Both blocks are attached to springs (k upwards to a height of 0.75 m above the equilibrium point of the spring (spring A isA = 33 N/m and kB = 15 N/m). Block A has been pulled initially stretched), while block B is at its equilibrium point. The system is released from rest, and block A begins to move downwards. Find the speed of block B when block A is passing through its equilibrium point.
