Answer:
The effect of gravity on object makes objects stable and not floating in the air . It also makes any object thrown up to return back
Potential energy behind dams
Let's use the equations for rectilinear motion. One particular equation is:
d = v₀t +(1/2)at²
Since it has been mentioned that the object starts from rest, then v₀ = 0. Substituting the values,
40 m = (0)(4 s) + (1/2)(a)(4 s)²
Solving for a,
a = 5 m/s²
<em>Therefore, the acceleration due to gravity is 5 m/s².</em>
Answer:
Approximately 
.
Approximately 
. (assumption: the LED here is an Ohmic resistor.)
Explanation:
The two resistors here 
and 
are connected in parallel. Their effective resistance would be equal to
.
The current in a serial circuit is supposed to be the same everywhere. In this case, the current through the LED should be 
. That should also be the current through the effective 
resistor. Make sure all values are in standard units. The voltage drop across that resistor would be
.
The voltage drop across the entire circuit would equal to
- the voltage drop across the resistors, plus
- the voltage drop across the LED.
In this case, that value would be equal to 
. That's the voltage that needs to be supplied to the circuit to achieve a current of 
through the LED.
Assuming that the LED is an Ohmic resistor. In other words, assume that its resistance is the same for all currents. Calculate its resistance:
.
The resistance of a serial circuit is equal to the resistance of its parts. In this case,
.
Again, the current in a serial circuit is the same in all appliances.
.
Its C. a decrease in the radius and an increase in the tangential speed ,I'm 100% sure
