Answer:
the mass of the truck is 2 kg.
Explanation:
Given;
mass of the car, m₁ = 3 kg
initial velocity of the car, u₁ = 40 m/s
initial velocity of the truck, u₂ = 60 m/s
let the mass of the truck = m₂
Apply the principle of conservation of linear momemtum;
m₁u₁ = m₂u₂
m₂ = (m₁u₁) / u₂
m₂ = (3 x 40) / (60)
m₂ = 2 kg
Therefore, the mass of the truck is 2 kg.
the answers going to be A
Answer:
calm down please its not that serious maybe no one saw it yet
Explanation:
Answer:
Explanation:
Power P = .5 mW = .5 x 10⁻³
P = Emax² / 2μo x c , c is velocity of light , μo is permeability of air .
Emax² = P x 2μo x c
= .5 x 10⁻³ x 2 x 4π x 10⁻⁷ x 3 x 10⁸
= 37.68 x 10⁻²
Emax = 6.14 x 10⁻¹
= .614 v/m
b) Bmax = Emax / c
= .614 / 3 x 10⁸
= .2046 x 10⁻⁸ T
= 20.46 x 10⁻¹⁰ T.
Answer:
6. W = 3 m g h
Explanation:
Displacement in moving from first floor to the fourth floor is 3h, and the total energy consumed in this process is (3.m.g.h) which is equal to the work done.
According to the work-energy equivalence the change in energy of a system is equal to the work done.
Here, change in potential energy:
