To solve this problem we will apply the concepts related to the conservation of momentum. By definition we know that the initial moment must be equivalent to the final moment of the two objects therefore


Here,
Mass of each object
Initial velocity of each object
= Final velocity of each object
Since the initial velocity relative to the metal tank is at rest, that velocity will be zero. And considering that in the end, the speed of the two bodies is the same, the equation would become

Rearranging to find the velocity,

Replacing we have that,


Therefore the velocity of the shark immediately after it swallows the tank is 
gold density = 38.6 *10^-3 / 2 *10^-6 = 19300 Kg/m3
Iron density = 46.8 *10^-3 / 6 *10^-6 = 7800 Kg/m3
water mass = density*volume = 1 * 10 = 10 grams = 0.01 Kg
Answer:600N/m
Explanation: Given ;
Applied force(F) = 180N
Total extension (l) = 30cm =0.30m
Spring constant(K) =?
From Hooke's law
F= kx
therefore k= F/x
k = 180N/0.3m
600N/m
Answer:
< 45319, 0, 0 > m
Explanation:
mass, m = 1550 kg
r = < 319, 0, 0 > m
v = < 4500, 0, 0 > m/s
t = 10 s
distance traveled in 10 second is
d = v x t
d = < 4500 x 10, 0 x 10, 0 x 10 > m
d = < 45000, 0, 0 > m
So, the new location of the car is
r' = r + d = < 319, 0, 0 > + < 45000, 0, 0 >
r' = < 45319, 0, 0 > m
Answer:
120 m/s
Explanation:
Acceleration = 6.4 m/s²
Initial velocity = 0 m/s
Time = 18 s
v = at + v₀
v = (6.4)(18) + 0
v = 115.2
Rounded to two significant figures, the final velocity is 120 m/s.