question 2 options:
Physics, 04.02.2020 08:00, jaxondbagley
Which of the following is not an example of a projectile?
question 2 options:
a baseball that has been pitched
a rock being thrown over a bridge
a person sitting in a chair, not moving
a car driving off a cliff
question 3 (10 points)
a plane is flying east when it drops some supplies to a designated target below. the supplies land after falling for 10 seconds. how high above the ground was the airplane when the supplies were dropped? (hint: d = 1/2gt2; g = -9.8 m/s2)
question 3 options:
120 meters
490 meters
980 meters
49 meters
question 4 (10 points)
as the supplies fell, they traveled 650 meters horizontally. how fast were the supplies and the airplane moving forward? remember that it took 10 seconds for them to reach the ground. (hint: v = d/t)
question 4 options:
65 m/s
6500 m/s
0.154 m/s
660 m/s
question 5 (10 points)
a projectile has a vertical component and a horizontal component.
question 5 options:
true
false
question 6 (10 points)
the shape of a projectile's trajectory is an ellipse.
question 6 options:
true
false
question 7 (10 points)
which of the following is not true about a vertical component?
question 7 options:
the vertical component of a projectile changes due to gravity.
the vertical component acts the same as an object in free fall.
the vertical component always equals the horizontal component.
Answers: 2
Physics, 22.06.2019 15:30, haha81
Identify the correct relation showing that the radius r of the orbit of a moon of a given planet can be determined from the radius r of the planet, the acceleration of gravity at the surface of the planet, and the time τ required by the moon to complete one full revolution about the planet. determine the acceleration of gravity at the surface of the planet jupiter knowing that r = 71 492 km and that t= 3.551 days and r= 670.9 × 10^3 km for its moon europa.
Answers: 2
Physics, 22.06.2019 21:10, ineedhelp2285
An athlete swings a ball, connected to the end of a chain, in a horizontal circle. the athlete is able to rotate the ball at the rate of 8.13 rev/s when the length of the chain is 0.600 m. when he increases the length to 0.900 m, he is able to rotate the ball only 6.04 rev/s. (a) which rate of rotation gives the greater speed for the ball? 6.04 rev/s 8.13 rev/s (b) what is the centripetal acceleration of the ball at 8.13 rev/s? m/s2 (c) what is the centripetal acceleration at 6.04 rev/s? m/s2
Answers: 2
Which of the following is not an example of a projectile?
question 2 options:
question 2 options:
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