Search & Filtering
A DVD is rotating with an ever-
increasing speed. How do the
centripetal acceleration (arad) and
tangential acceleration (atan)
compare at points P and Q?
A. P and Q have the same arad
and atan.
B. Q has a greater arad and a
greater atan than P.
C. Q has a smaller arad and a greater atan than P.
D. P and Q have the same arad, but Q has a greater atan than P.
line PQ on the disc’s surface is along
the +x-axis. The disc begins to turn
with a constant z = 5.0 rad/s2.
At t = 0.40 s, what is the angle
between the line PQ and the +x-axis?
L = 10mh, R 200 Ω. If Oscillatory, find the frequency of oscillation and resonant frequency
the circuit oscillatory? What is the natural frequency?
A beam of electrons enters a region in which there are electric and magnetic fields directed at right angles. It passes straight through without deviation.
Consider this as if electrons are travelling from the left side towards the right. The electric fields are going from top towards bottom. The magnetic fields are going into the plane of the paper/diagram.
A second beam of electrons travelling twice as fast as the first is then directed along the same line.
How is this second beam deviated?
A. Downwards in the plane of the paper.
B. Upwards in the plane of the paper.
C. Out of the plane of the paper.
D. Into the plane of the paper.
Kindly, tell me what should be its answer and why, please.
Thank You.
A 50.0 kg crate is at the top of a ramp that makes a 30o angle with level ground. If the crate starts to slide and the coefficient of kinetic friction between the crate and the ramp is 0.42, what is the acceleration of the crate?
