Two similar objects are moved by two bulldozers. If the work accomplished by bulldozer #2 was three times greater than bulldozer #1 then: Both bulldozers did equal work because the objects are similar. Bulldozer #2 had to move 3 times greater distance. Bulldozer # 1 had to move 3 times greater distance. Bulldozer #2 had to require 3 times greater power.

The force acting on a beam was measured under the same operating conditions and a sample of 5 data points was collected. this process was repeated by 3 observers. the pooled standard deviations of these 3 data sets was 1.21. determine the true mean force using all pooled data (with a 95% probability). the result should look like this: true mean = mean +/- margin of error

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.

Will mark as brainliest how does a catapult increase the trajectory of an object? ps. answer as if u were a 5th grader