PLEASE HELP! I'm so confused A worker applies an input force of 74 N [up] to open a window with a crowbar that provides an output force of 611 N [up]. What is the crowbar’s mechanical advantage?

It takes 120 J of work to lift an elevator 20 m. If this is done in 28 s, what is the average power of the elevator during the process?

Suppose you are moving a box of books. Calculate your power output if you exert a force of 55.0 N to push the box 14.0 m in 13.0s.

How long does it take for a 466 watt machine to do 2740 J of work?

While rowing in a race, John uses his arms to exert a force of 177 N [down] while pulling the oar 0.75 m. How much work does he do?

If 5.0 J of work is done in raising a 1.76 N apple, how far was it lifted?

If you do 2500 J of work on a box that you moved 5.0 m to the right, what force did you use to move the box?

A 8.0 meter long ramp is use to lift a piano into a moving truck which is 2.5 meters off the ground. What is the mechanical advantage of the ramp?

A 6.0 kg box is lifted upward at a constant speed to a height of 7.5 m. What work is done on the box?

1134567 a jet with mass m = 1.1 ă— 105 kg jet accelerates down the runway for takeoff at 2 m/s2. 1) what is the net horizontal force on the airplane as it accelerates for takeoff? 2.2*10^5 n your submissions: 2.2*10^5 computed value: 220000submitted: saturday, january 26 at 2: 41 pm feedback: correct! 2) what is the net vertical force on the airplane as it accelerates for takeoff? 0 n your submissions: 0 computed value: 0submitted: saturday, january 26 at 2: 41 pm feedback: correct! 3) once off the ground, the plane climbs upward for 20 seconds. during this time, the vertical speed increases from zero to 21 m/s, while the horizontal speed increases from 80 m/s to 95 m/s. what is the net horizontal force on the airplane as it climbs upward? n 4) what is the net vertical force on the airplane as it climbs upward? n 5) after reaching cruising altitude, the plane levels off, keeping the horizontal speed constant, but smoothly reducing the vertical speed to zero, in 13 seconds. what is the net horizontal force on the airplane as it levels off? n 6) what is the net vertical force on the airplane as it levels off?

Drag each tile to the correct box. tiles bra i sequence

Alead ball is dropped into a lake from a diving board 5m above the water . it hits the water with a certain velocity and then sink with constant velocity in bottom . it reaches the bottom 5 second after it is dropped if g= 10m/s2 . find depth of the lake and average velocity of the ball ?