Answer:
There are three types of material as per the condition of charge flow
1) Conductor
2) Insulator
3) Semiconductor
1) Conductors
As we know that conductors are those which offer very small resistance to the flow of charge
Resistivity of the conductors are very small
2) Insulators
These type of materials offer large resistance to the flow of charges and it will not pass the current through it
So resistivity of the insulators are large as compared to conductors
If you increase speed you have to increase force to keep a balance Newton's second law.
Answer: 88 m/s
Explanation:
If we are talking about an acceleration at a uniform rate, we are dealing with constant acceleration, hence we can use the following equation:
(1)
Where:
Is the final velocity of the plane (we know it is zero because we are told the pilot stops the plane at a specific distance)
Is the initial velocity of the plane
is the constant acceleration of the plane
is the distance at which the plane stops
Isolating from (1):
(2)
(3)
Finally:
This is the veocity the plane had before braking began
Answer:
a) 1.94 m/s
b) 120 m
Explanation:
Convert km/h to m/s:
6 km/h = 1.67 m/s
a) The final speed is found with Pythagorean theorem:
v = √((1.67 m/s)² + (1 m/s)²)
v = 1.94 m/s
b) The time it takes the boat to cross the river is:
t = (200 m) / (1.67 m/s)
t = 120 s
The displacement in the direction of the current is:
x = (1 m/s) (120 s)
x = 120 m
