Answer:
Height of cliff = S = 20 m (Approx)
Explanation:
Given:
Initial velocity = 8 m/s
Distance s = 16 m
Starting acceleration (a) = 0
Computation:
s = ut + 1/2a(t)²
16 = 8t
t = 2 sec
Height of cliff = S
Gravitational acceleration = 10 m/s
S = 1/2a(t)²
S = 1/2(10)(2)²
Height of cliff = S = 20 m (Approx)
Answer:
Option A nuclear
Explanation:
The rate of electricity production in nuclear power plant is much higher as compared to the rate of electricity generation in gas, wind and solar power plants.
Thus, in case where large amount of electricity is to be produced in a short period then one must rely on nuclear power plants.
Therefore, option A is correct
Answer:
a₂ = 1.9 m/s²
Explanation:
Newton's third law or principle of action and reaction :
Force of the boy on the girl = - Force of the girl on the boy
Fbg = - Fgb Formula (1)
Newton's second law
∑F = m*a Formula (2)
∑F : algebraic sum of the forces in Newton (N)
m : mass in kilograms (kg)
a : acceleration in meters over second square (m/s²)
Newton's second law to the girl
m₁ : girl mass
a₁ : acceleration of the girl toward the boy
∑F = m₁*a₁
Fbg= (40kg)*(3 m/s²)
Fbg = 120 N
Newton's second law to the boy
m₂: boy mass
a₂ : acceleration of the boy toward the girl
∑F = m₂*a₂
Fgb = (63)*a₂
120 = (63)*a₂
a₂ = 120 / (63)
a₂ = 1.9 m/s²
They decompose and leave their nutrients in the earth.
Answer:
The second ball hits at the same time.
Distance travelled is 65 meters
Explanation:
