Answer:
Because molecules are to small for us people to see with the bare eye, unless you use a telescope.
Explanation:
Answer:
55.897905
Explanation:
1 Newton in Earth gravity is the equivalent weight of 1/9.80665 kg on Earth
9.80665 times 5.7=55.897905
Brainliest?
Answer:
Explanation:
a )
Iz( t ) = A + B t²
Iz( t ) = angular velocity
putting dimensional formula
T⁻¹ = A + Bt²
A = T⁻¹
unit of A is rad s⁻¹
BT² = T⁻¹
B = T⁻³
unit of B is rad s⁻³
b )
Iz( t ) = A + B t²
dIz / dt = 2Bt
angular acceleration = 2Bt
at t = 0
angular acceleration = 0
at t = 5
angular acceleration = 2 x 1.6 x 5
= 16 rad / s²
Iz( t ) = A + B t²
dθ / dt = A + B t²
integrating ,
θ = At + B t³ / 3
when t = 0 , θ = 0
when t = 2
θ = At + B t³ / 3
= 2.65 x 2 + 1.6 x 2³ / 3
= 5.3 + 4.27
= 9.57 rad .
Flywheel turns by 9.57 rad during first 2 s .
Answer:
The force the ceiling exert on the hook is 321.67 N
Explanation:
Here we have the weights being 75 N and 125 N
The weight of the pulley = 80 N
Total weight hung from the ceiling = 75 + 125 + 80 = 280 N
Therefore since the forces acting on the ceiling tends to act downwards as they are the forces due to weights, we have
The force on the
T₁ - 125 = m₂a =
m₂ = 125/9.8 = 12.76 kg
Similarly T₂ - 75 = m₁a, m₁ = 7.65 kg
acceleration is given by
= 2.042 m/s²
Therefore
T₁ - 125 = m₂a = 12.76 × 2.042 = 26.04 N and
T₁ = 125 + 26.04 = 151.04 N
Similarly T₂ - 75 = m₁a = 7.65 × 2.042 = 15.63 N
T₂ = 15.63 + 75 = 90.63 N
Force on hook = Force exerted by ceiling on hook = T₁ + T₂ + Weight of pulley = 151.04 + 90.63 + 80 = 321.67 N
Answer:
F = 592238.09 N
Explanation:
To find the mean force you first calculate the acceleration by using the following kinematic equation:
you do "a" the subject of the equation and replace the values of the other parameters:
next, the force, by using the second Newton law is:
hence, the force is 592238.09 N
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TRANSLATION:
Para encontrar a força média, primeiro calcule a aceleração usando a seguinte equação cinemática:
você faz "a" o assunto da equação e substitui os valores dos outros parâmetros:
Em seguida, a força, usando a segunda lei de Newton, é:
portanto, a força é 592238.09 N