14. Olive accompanies her father to the park for an afternoon of fun. While

there, she hops on the swing and begins to swing back and forth once

every 4 seconds. The period of her swing is: *

0.25 Hz

0.25 seconds

4.0 Hz

4.0 seconds

this is a good question! i'll do some research and come back when i have the answer!

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

helium

oxygen

neon

sodium