You and a friend are jumping on a trampoline. why does earth, which is rapidly orbiting around the sun, not move under your feet when you jump? a. newton's third law holds that there is an equal and opposite force exerted by the trampoline on your feet, which allows you to move with earth through space. b. newton's first law holds that your body moves along with earth because it is not compelled to change its motion by an unbalanced force. c. newton's second law holds that the acceleration produced by the force of gravity is offset by the force of friction on your feet. d. there are different rules in space and on the surface of the earth

Explanation:

You and a friend are jumping on a trampoline. Earth, which is rapidly orbiting around the sun, not move under your feet when you jump. This is due to Newton's first law of motion which states that "until an external unbalanced force acts on an object, it will remain at rest or in motion".

So, as per first law of motion, our body moves along with Earth because it is not compelled to change its motion by an unbalanced force.

Hence, the first option is (b).

one person pulls 90n one way and the other has 100n pulling the other way.

so the net force = 90 - 100 = -10n,

or the ans can be 10n if the picture shows -90n and 100n instead.

weight of the box is given as

here this is placed on the inclined of angle 42 degree

now this weight will have two components one is along the incline other is perpendicular to it

so here we need to apply a force parallel to incline opposite to its component of weight

so here the component of weight is given as

here we have

so it requires 75 n force to move it upwards