Physics, 28.08.2019 09:00 jbearallen9557
A65.0 kg ice-skater standing on frictionless ice throws a 0.15 kg snowball horizontally at a speed of 32.0 m/s. at what speed does the skater move backward?
a. 3.0 x 10-1 m/s
c. 7.4 x 10-2 m/s
b. -7.4 x 10-2 m/s
d. 4.9 x 10-1 m/s
Answers: 1
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Arunner is jogging at a steady 3.6 km/hr. when the runner is 2.9 km from the finish line, a bird begins flying from the runner to the finish line at 14.4 km/hr (4 times as fast as the runner). when the bird reaches the finish line, it turns around and flies back to the runner. even though the bird is a dodo, we will assume that it occupies only one point in space, i.e., a zero-length bird. how far does the bird travel? (b) after this first encounter, the bird then turns around and flies from the runner back to the finish line, turns around again and flies back to the runner. the bird repeats the back and forth trips until the runner reaches the finish line. how far does the bird travel from the beginning? (i.e. include the distance traveled to the first encounter)
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Physics, 22.06.2019 16:40
The force needed to overcome static friction is usually less than that needed to overcome kinetic friction.true or false?
Answers: 1
A65.0 kg ice-skater standing on frictionless ice throws a 0.15 kg snowball horizontally at a speed o...
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