An aging coyote cannot run fast enough to catch a road-runner. He purchases on eBay a set of jet-powered roller skates, which provide a constant horizontal acceleration of 15.0 m/s 2 (Fig. P1.78). The coyote starts at rest 70.0 in from the edge of a cliff at the instant the roadrunner zips past in the direction of the cliff, (a) Determine the minimum constant speed the roadrunner must have to reach the cliff before the coyote. At the edge of the cliff', the roadrunner escapes by making a sudden turn, while the coyote continues straight ahead. The coyote’s skates remain horizontal and continue to operate while he is in flight, so his acceleration while in the air ss (15.0 - 9.80 j → ) m/s 2 , (b) The cliff is 100 m above the flat floor of the desert. Determine how far from the base of the vertical cliff the coyote lands, (c) Determine the components of the coyote’s impact velocity.
An aging coyote cannot run fast enough to catch a road-runner. He purchases on eBay a set of jet-powered roller skates, which provide a constant horizontal acceleration of 15.0 m/s 2 (Fig. P1.78). The coyote starts at rest 70.0 in from the edge of a cliff at the instant the roadrunner zips past in the direction of the cliff, (a) Determine the minimum constant speed the roadrunner must have to reach the cliff before the coyote. At the edge of the cliff', the roadrunner escapes by making a sudden turn, while the coyote continues straight ahead. The coyote’s skates remain horizontal and continue to operate while he is in flight, so his acceleration while in the air ss (15.0 - 9.80 j → ) m/s 2 , (b) The cliff is 100 m above the flat floor of the desert. Determine how far from the base of the vertical cliff the coyote lands, (c) Determine the components of the coyote’s impact velocity.
Solution Summary: The author determines the minimum constant speed required by the roadrunner to reach the cliff before the coyote.
An aging coyote cannot run fast enough to catch a road-runner. He purchases on eBay a set of jet-powered roller skates, which provide a constant horizontal acceleration of 15.0 m/s2 (Fig. P1.78). The coyote starts at rest 70.0 in from the edge of a cliff at the instant the roadrunner zips past in the direction of the cliff, (a) Determine the minimum constant speed the roadrunner must have to reach the cliff before the coyote. At the edge of the cliff', the roadrunner escapes by making a sudden turn, while the coyote continues straight ahead. The coyote’s skates remain horizontal and continue to operate while he is in flight, so his acceleration while in the air ss (15.0 - 9.80
j
→
) m/s2, (b) The cliff is 100 m above the flat floor of the desert. Determine how far from the base of the vertical cliff the coyote lands, (c) Determine the components of the coyote’s impact velocity.
What is the net charge on a sphere that has the following?
x
(a) 5.75 × 106 electrons and 8.49 × 106 protons
4.39e-13
What is the charge of an electron? What is the charge of a proton? C
(b)
200 electrons and 109 protons
1.60e-10
What is the charge of an electron? What is the charge of a proton? C
A spider begins to spin a web by first hanging from a ceiling by his fine, silk fiber. He has a mass of 0.025 kg and a charge of 3.5 μC. A second spider with a charge of 4.2 μC rests in her own web exactly 2.1 m vertically below the first
spider.
(a) What is the magnitude of the electric field due to the charge on the second spider at the position of the first spider?
8.57e3
N/C
(b) What is the tension in the silk fiber above the first spider?
0.125
How does the electric field relate to the force? How do you calculate the net force? N
Point charges of 6.50 μC and -2.50 μC are placed 0.300 m apart. (Assume the negative charge is located to the right of the positive charge. Include the sign of the value in your answers.)
(a) Where can a third charge be placed so that the net force on it is zero?
0.49
m to the right of the -2.50 μC charge
(b) What if both charges are positive?
0.185
xm to the right of the 2.50 μC charge
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