A ball is rolling around a curved horizontal track. Which of the paths represents the path of the ball when it leaves the track?
B. (use Newton’s 1st law)
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An astronaut on another planet drops a 1-kg rock from rest and finds that it falls a vertical distance of 2.5 meters in one second. On this planet, the rock has a weight of
A) 1 N. B) 2 N. C) 3 N. D) 4 N. E) 5 N.
For each 8-km segment of a satellite in close Earth orbit, the "drop" toward Earth is about
A) 5 m. B) 10 m. C) also 8 km.
One 3.2-kg paint bucket is hanging by a massless cord from another 3.2-kg paint bucket, also hanging by a massless cord, as shown in the figure
a) If the buckets are at rest, what is the tension in each cord?
b) If the two buckets are pulled upward with an acceleration of 1.25 m/s by the upper cord, calculate the tension in each cord.
A jet aircraft, in level flight at constant speed, is observed directly overhead. A sonic boom is heard 13.0 s later, at which time the line of sight to the aircraft forms a 51° angle with respect to the horizontal. The speed of sound is 325 m/s
The altitude of the aircraft is closest to A) 6700 m. B) 5400 m. C) 8300 m. D) 2700 m. E) 13,000 m.