If you stand at rest on a weighing scale and find that you are pulled toward Earth with a force of 500 N, then the normal force on the scale is also N and you weigh N. How much does Earth weigh? If you tip the scale upside down and repeat the weighing process, you and Earth are still pulled together with a force of N, and therefore, relative to you, the whole 6 x 10^24 kg Earth weighs N

the small 0.38-kg slider is known to move from position a to position b along the vertical-plane slot. determine (a) the work done on the body by its weight and (b) the work done on the body by the spring. the distance r = 0.70 m, the spring modulus k = 154 n/m, and the unstretched length of the spring is 0.53 m

explanation:

-reverse card

truck y has a greater velocity than truck x.

distance = 150m

displ = root (50 ^2 + 100^2)

root(2500+10000)

root 125000