C. because if you push a ball on one side and on the other side with the same amount of force at the same time it won’t move.
Hope this helps
Answer:
f = 8 N
Explanation:
Data provided in the question
Radius of the pulley = r = 0.05 m
Moment of inertia = (I) = 0.2 kg.m^{2}
Angular acceleration = ∝ = 2 rad/sec
Based on the above information
As we know that
Torque is


And,
Torque is also


So,
We can say that


0.05f = 0.4
f = 8 N
We simply applied the above formulas
Answer:
Explanation:
When a sound is produced by a stationary point source , moving waves are produced around it in circles consisting of compression and rarefaction . These compression and rarefaction are mutually equidistant. But when the source moves in a particular direction , waves get compressed in that direction . If in a distance of V , n number of waves are formed , in case of moving source , same no of waves will lie in V - v distance in the direction of motion. . Here V is velocity of sound , v is velocity of source and n is no of waves being produced per second. So we see that distance between two consecutive waves becomes smaller . Or , waves get compressed . In this region frequency becomes greater.
A is standing left of source and source is moving towards left , hence A. will hear highest pitch or greatest frequency.
Immediately after the switch is closed, the capacitor acts like a short circuit for a very small time. We can calculate the currents through each resistor by first calculating the total resistance:
Req = 1/(1/3+1/6) + 8 = 1/(3/6) + 8 = 2 + 8 = 10 ohms.
IR1 = E / Req = 42 / 10 = 4.2 A.
VR2 = VR3 = E * R23 / Req = 42 * 2 / 10 = 8.4 V
IR2 = VR2 / R2 = 8.4 / 6 = 1.4 A.
IR3 = VR3 / R3 = 8.4 / 3 = 2.8 A.
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