A 3000kg jeepney moving at 20m/s collides with a 2000kg car (at rest). If they stick together after the collision, what is the speed of the combined system? a) 28 m/s b) 14 m/s c) 12 m/s d) 8.0 m/s
1) A 3000kg jeepney moving at 20m/s collides with a 2000kg car (at rest). If they stick together after the collision, what is the speed of the combined system?
a) 28 m/s b) 14 m/s c) 12 m/s d) 8.0 m/s
2)Three objects of 2.5 kg each are placed in the following coordinates in the xy plane: object 1 (0, 5cm), object 2 (10cm,0) and object 3 (10cm,5cm). Determine the location of their center of mass.
a) (3.33cm, 3.33cm) b) (6.67cm, 6.67cm) c) (3.33cm, 1.67cm) d) (6.67cm,3.33cm)
3) Maria has a mass of 47.0 kg is resting on a frictionless horizontal surface. She is hit by a 270g volleyball with a speed of 50.0 km/h to the right. Assuming the collision is elastic, what is the kinetic energy of the system before the collision?
a) 26.0 J b) 338 J c) 6.75´103J d) 1.88 ´103J
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