A 0.400-kg ball approaches a very massive wall at 20.0 m/s perpendicular to wall and rebounds with 70.0% of its initial kinetic energy. What is the magnitude of the change in momentum of the wall?
A)
14.7 kg?m/s
B)
13.6 kg?m/s
C)
2.40 kg?m/s
D)
1.31 kg?m/s
E)
0.00 kg?m/s
A
You might also like to view...
Two blocks, m1 = 1.0 kg and m2 = 2.0 kg, are connected by a light string as shown in the figure. If the radius of the pulley is 1.0 m and its rotational inertia is 5.0 kg?m2, the acceleration of the system is
?
?
A. (1/6)g B. (3/8)g C. (1/8)g D. (1/2)g E. (5/8)g
A non-uniform, 80-g, meter stick balances when the support is placed at the 51.0-cm mark. At what location on the stick should a 5.0-g tack be placed so that the stick will balance at the 50.0 cm mark?
A) 16.0 cm B) 67.0 cm C) 66.0 cm D) 35.0 cm E) 34.0 cm
Riders on a ferris wheel move in a circle with a speed of 4.0 m/s. As they go around, they experience a centripetal acceleration of 2.0 m/s^2 . What is the diameter of this particular ferris wheel?
A. 4.0 m B. 6.o m C. 8.0 m D. 16 m E. 24 m
The critical angle is least in
A) glass. B) water. C) diamond. D) vacuum.