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zheka24 [161]
3 years ago
6

A car with a mass of 1.1 × 103 kilograms hits a stationary truck with a mass of 2.3 × 103 kilograms from the rear end. The initi

al velocity of the car is +22.0 meters/second. After the collision the velocity of the car is -11.0 meters/second. What is the velocity of the truck after this elastic collision?
A.+13 meters/second
B.+20 meters/second
C.+15.7 meters/second
D.+7.5 meters/second
E.+9.8 meters/second
Chemistry
2 answers:
LenaWriter [7]3 years ago
7 0

Answer:

c

Explanation:

FOR PLATO

d1i1m1o1n [39]3 years ago
6 0
The answer is C : 15.7 m/s
Use the idea of : momentum before collision = momentum after collision

Before collision;
For car:mass=1.1×10^3, velocity=22
For truck:mass=2.3×10^3, velocity=0
After collision;
For car:mass=2.3×10^3, velocity=-11
For truck:mass=2.3×10^3, velocity=V
(1.1×10^3 × 22) + (2.3×10^3 × 0) = (1.1×10^3 × -11) + (2.3×10^3 × V)
24200 = -12100 + 2.3×10^3V
2.3×10^3V = 36300
V = 15.7 m/s
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