Answers: 1
Physics, 22.06.2019 10:40
As you are trying to move a heavy box of mass m, you realize that it is too heavy for you to lift by yourself. there is no one around to , so you attach an ideal pulley to the box and a massless rope to the ceiling, which you wrap around the pulley. you pull up on the rope to lift the box. use g for the magnitude of the acceleration due to gravity and neglect friction forces. once you have pulled hard enough to start the box moving upward, what is the magnitude f of the upward force you must apply to the rope to start raising the box with constant velocity? express the magnitude of the force in terms of m, the mass of the box.
Answers: 1
Physics, 23.06.2019 00:20
The brightest star in the night sky in the northern hemisphere is sirius. its distance from earth is estimated to be 8.7 light years. a light year is the distance light travels in one year. light travels at a speed of 3.00 × 108 m/s. calculate the distance from earth to sirius in miles. (1 mi = 5280 ft) g
Answers: 2
Physics, 23.06.2019 07:00
Roger pushes a box on a 30° incline. if he applies a force of 60 newtons parallel to the incline and displaces the box 10 meters along the incline, how much work will he do on the box? a. 5.2 × 102 joules b. 6.0 × 102 joules c. -5.2 × 102 joules d. -6.0 × 102 joules
Answers: 3
Why is water pollution a concern if water is continuously cycled through Earth’s systems?
EARTH SCI...
Chemistry, 23.07.2019 21:00
Computers and Technology, 23.07.2019 21:00
Chemistry, 23.07.2019 21:00
Arts, 23.07.2019 21:00
Mathematics, 23.07.2019 21:00
Mathematics, 23.07.2019 21:00
Arts, 23.07.2019 21:00
Geography, 23.07.2019 21:00
Health, 23.07.2019 21:00
Biology, 23.07.2019 21:00
Mathematics, 23.07.2019 21:00
Social Studies, 23.07.2019 21:00
History, 23.07.2019 21:00