Two cars are traveling at the same speed and hit the brakes at the same time. Car A decelerates (decreases its velocity) at twice the rate of car B. If car A travels a distance D before stopping, how far does car B travel before stopping?
A) 4D
B) 2D
C) D
D) D/2
E) D/4
B
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cable and frictionless pulley system at D is used to bring a 230-kg pole (ACB) to a vertical position as shown in the figure. The cable has tensile force T and is attached at C. The reaction force components, Ax and Ay, at A (in newtons) are:
(A) 3102, 21270
(B) 21270, 3102
(C) 21342, 4214
(D) 23102, 4204
Express an angle of 35.20 rad in degrees
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What will be an ideal response?
In the context of neutron stars, which of the following statements is true of pulsars?
A) Neutron stars older than 10 million years rotate too slowly to generate detectable radio beams. B) When a pulsar first forms, it spins only around 10 times a second. C) As a pulsar blasts beams of radiation outward, its rotation speeds up. D) Supernova remnants last more than 150,000 years before they mix into the interstellar medium and disappear.