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kellinvagneur
28.12.2020 •
Physics
A car and a large truck traveling at the same speed collide head-on and stick together. Which vehicle experiences the larger change in the magnitude of its momentum
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Ответ:
Both vehicles experience the same change in momentum
Explanation:
Let m represent the mass of the vehicle, and 2m represent the mass of the large truck, and let v represent their initial speed, we have;
The total initial momentum,
given as follows;
The total final momentum,
= (2·m + m) × ![v_f](/tpl/images/1008/6912/ab1c5.png)
By the principle of conservation of linear momentum, the total initial momentum = The total final momentum
m·v = (2·m + m) ×![v_f](/tpl/images/1008/6912/ab1c5.png)
m·v = 3·m·![v_f](/tpl/images/1008/6912/ab1c5.png)
∴ v = 3 ×![v_f](/tpl/images/1008/6912/ab1c5.png)
The change in the momentum for the large truck = 2·m·v - 2·m·![v_f](/tpl/images/1008/6912/ab1c5.png)
Therefore;
The change in the momentum for the large truck = 2·m·v - 2·m·v/3 = 2·m·(v - v/3)
The change in the momentum for the large truck = 2·m·(v - v/3) = 2·m·2·v/3 = 4·m·v/3
The change in the momentum for the car = m·v - m·(-
) = m·v - m·(-v)/3 = m·v + m·(v)/3 = 4·m·v/3
Therefore, the change in the momentum for the large truck = The change in the momentum for the car and both vehicles experience the same change in momentum.
Ответ:
170m
Explanation:
V=d/t
V= velocity
D= displacement
T=time
D=v*t
D=17*1000
D= 17000cm
Convert to metres
D= 17000/100
D= 170m