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29.02.2020 •
Engineering
An electric car is designed to run off a bank of 14.0-V batteries with total energy storage of 3.00 × 10 7 J. If the electric motor draws 7 000 W, what current will be delivered to the motor?
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Ответ:
I =500 A
Explanation:
Given that
Power ,P = 700 W
Potential difference ,ΔV = 14 V
Lets take current = I
We know that power P is given as
P = V I
I=Current
ΔV =Voltage difference
P=Power
Now by putting the values in above equation
7000 = 14 x I
I =500 A
Therefore the current will be 500 A.
Ответ:
Explanation:
a) On the verge of tipping over, reaction acts at the corner A
When slippage occurs,
Block moves w/ const. velocity equilibrium
Three-force member: reaction at A must pass through B
tan b/2h, h b/ 2 θ µ = = ∴= k k ( µ )
b) When slippage occurs,
Block moves w/ const. velocity equilibrium
Three-force member: reaction at C must pass through G
k tanθ µ =
tan x/ H/2 , x H/2