Answer:
12294.31 m/s
Explanation:
Momentum = (mass)(velocity)
Momentum before = Momentum after
(momentum of bullet)+(momentum of block)=(momentum of bullet and block)
0.035v+50(0)=(0.035+50)(8.6)
0.035v=430.301
v=12294.3142857m/s
Answer:
The mass of the fish is 18.1 kg.
Explanation:
Given;
weight of the fish, F = 108 N
extension of the spring by the given weight, x = 14 cm = 0.14 m
First, determine the elastic constant of the spring by applying Hook's law;
F = kx
where;
k is the spring constant
k = F/x
k = 108 / 0.14
k = 771.43 N/m
When the spring is stretched to 23cm, the mass of the fish is calculated as follows;
Therefore, the mass of the fish is 18.1 kg.
Answer:
Explanation:
Modulus of elasticity of brick, Y = 28 x 10^9 Pa
mass of each, m = 40 kg
Area of each, A = 0.5 m²
number of bricks, n = 4
height, h = 5 m
Let the change in height is Δh.
Use the formula of Modulus of elasticity
E = stress/ strain
stress = n x m x g/A = 4 x 40 x 9.8 / 0.5 = 3136 Pa
So,
Δh = 5.6 x 10^-7 m