What happens to the inertia of an object of its mass is decreased?

Ais not a compound machine. a. bolt b. shovel c. handcart (dolly) d. see-saw (teeter totter)

An incident ray through the focal point of a spherical mirror will: reflect through the center of curvature. reflect back through the focal point. reflect parallel to the principle axis. reflect the same direction as the incident ray.

Akg a of 55 m at an of 11 ? . if is at 98 km/h,be ?