25.0 kg dog is trapped on a rock in the middle of a narrow river. A 66.0-kg rescuer has assembled a swing with negligible mass that she will use to swing down and catch the trapped dog at the bottom of her swing, and then continue swinging to the other side of the river. The ledge that the rescuer swings from is 5.0 m above the rock, which is not high enough so the rescuer and dog together can reach the other side of the river, which is 3.0 m above the rock. However, the rescuer can use a ladder to increase the height from which she swings. What is the minimum height of the ladder the rescuer must use so both dog and rescuer make it to the other side of the river? Assume that friction and air resistance are negligible.
Answers: 2
Physics, 22.06.2019 00:00
A1000-kg weather rocket is launched straight up. the rocket motor provides a constant acceleration for 16-s, then the motor stops. the rocket altitude 20-s after launch is 510-m. you can ignore any effects of air resistance. a. what was the rocket’s acceleration during the first 16-s? b. what is the rocket’s speed as it passes through a cloud 5100-m above the ground?
Answers: 1
Physics, 22.06.2019 05:00
In a stagnant pool of water, a crayfish may spend much of its time lying with one side of its carapace near the surface of the water. in this position, it will move the walking legs on that side in a rhythmic back-and-forth motion. explain the likely function of this behavior.
Answers: 1
Physics, 22.06.2019 05:30
Astudent pushes on a 20.0 kg box with a force of 50 n at an angle of 30° below the horizontal. the box accelerates at a rate of 0.5 m/s2 across a horizontal floor. what is the value of the normal force on the box? 200 n 243 n 156 n 225 n
Answers: 2
Physics, 22.06.2019 10:00
The frequencies refer to the sample data collected from a population of interest when performing a hypothesis test comparing two or more population proportions.
Answers: 2
25.0 kg dog is trapped on a rock in the middle of a narrow river. A 66.0-kg rescuer has assembled a...
Mathematics, 25.05.2021 21:00
Mathematics, 25.05.2021 21:00
Mathematics, 25.05.2021 21:00
Spanish, 25.05.2021 21:00
Chemistry, 25.05.2021 21:00
English, 25.05.2021 21:00
Mathematics, 25.05.2021 21:00
Mathematics, 25.05.2021 21:00
Chemistry, 25.05.2021 21:00
Mathematics, 25.05.2021 21:00
Mathematics, 25.05.2021 21:00
Computers and Technology, 25.05.2021 21:00
Mathematics, 25.05.2021 21:00
Biology, 25.05.2021 21:00