6. A system consists of a 5.00-kg object moving down along the y -axis at a spee
ID: 1397105 • Letter: 6
Question
6.
A system consists of a 5.00-kg object moving down along the y-axis at a speed of 25.0 m/s, as well as an 8.00-kg object . The system has a net momentum of 124 kg?m/s in the direction of the +x axis. What is the velocity of the 8.00-kg object? Express the direction of its velocity as a counterclockwise angle to the +x-axis.
12 m/s, direction 40°
25 m/s, direction 30°
75 m/s, direction 60°
22 m/s, direction 45°
7.
Vehicle A has mass m and is traveling at velocity 10 m/s due east. Vehicle B has mass 3m and is traveling at velocity 8.0 m/s due north. The vehicles collide at an intersection and become entangled. What is the velocity of the two joined vehicles immediately after the collision? (Assign north to be 0° and east to be 90°.)
8.4 m/s at 23°
8.4 m/s at 19°
6.5 m/s at 23°
6.5 m/s at 19°
8.
As shown in the diagram, three objects are moving along a straight line. Taking the positive direction to be to the right, what is the total momentum of this system?
+106 kg?m/s
-14.0 kg?m/s
0 kg?m/s
+14.0 kg?m/s
-106 kg?m/s
9.
A 0.78-kg blob of clay strikes a wall at speed 23m/s The clay comes to a stop in 0.26 s. What is the average force that the wall exerts on the clay?
36 N
55 N
49 N
69 N
10.
The change in an object's momentum over time () is equal to _____.
the force acting on the object
the product of the mass and net acceleration of the object.
the impulse of the force acting on the object
the change in kinetic energy of the object
11.
As shown in the diagram, three objects are moving along a straight line. Taking the positive direction to be to the right, what is the total momentum of this system?
0 kg?m/s
-1 kg?m/s
143 kg?m/s
1 kg?m/s
-143 kg?m/s
6.
A system consists of a 5.00-kg object moving down along the y-axis at a speed of 25.0 m/s, as well as an 8.00-kg object . The system has a net momentum of 124 kg?m/s in the direction of the +x axis. What is the velocity of the 8.00-kg object? Express the direction of its velocity as a counterclockwise angle to the +x-axis.
12 m/s, direction 40°
25 m/s, direction 30°
75 m/s, direction 60°
22 m/s, direction 45°
8.00 kg 5.00 ? 25.0 m/sExplanation / Answer
(8) Total momentum = m1 v1 + m2 v2 + m3 v3 = 5 * 8 - 4 * 15 + 2 * 3 = - 14.0 kg m/s
(9) Average force exerted = m dv / t = 0.78 * (23-0)/0.26 = 69 N
(10) The change in an object's momentum over time () is equal to = the product of the mass and net acceleration of the object , the force acting on the object
(11) Total momentum = m1 v1 + m2 v2 + m3 v3 = 3 * 5 - 12*6 + 7*8 = - 1 kg m/s
Related Questions
drjack9650@gmail.com
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.