Answer:
(A) 654.545 Kw
(B)
Explanation:
We have given resistance of the toaster
Resistance of nichrome heating element
Both the resistances are connected in series so same current will flow through the circuit
Potential difference across the toaster V = 120 volt
So current
(a) Power dissipated in toaster
(B) Power dissipated in heating element
Answer:
C
Explanation:
The total kinetic energy is the sum of the kinetic energy in the center of mass (Rotational Kinetic energy) plus the kinetic energy of the center of mass( Translational Kinetic Energy).
The formula
is applicable only when
The moment of inertia must be taken about an axis through the center of mass.
Answer:
14.3
Explanation:
The distance s as a function of time can be written as:
The rate of change is the derivative of d with respect to time:
The time t when the track has been traveling for 81 miles is given by:
Using t in the previous equation gives:
Answer:
the weight of the rider is 493.53 N
Explanation:
Given the data in the question and as illustrated in the image below,
Tension T = 1900 N
the rider is moving at a constant speed so the net force in the horizontal direction will be 0
In the horizontal direction
Fcos( 30° ) = Tcos ( 17° )
F = Tcos( 17° ) / cos( 30° )
F = 1900cos( 17° ) / cos( 30° )
F = 2098.07 N
Now, In the vertical direction,
F sin( 30° ) = W + T sin( 17° )
W = F sin( 30° ) - T sin( 17° )
W = 2098.07sin( 30° ) - 1900sin( 17° )
W = 1049.035 - 555.506
W = 493.53 N
Therefore, the weight of the rider is 493.53 N
