We use plane mirror instead of a spherical mirror to see our face

Aknife blade is a(n) a. lever b. screw c. wedge d. inclined plane

Which diagram correctly demonstrates the various forces acting on a ball moving horizontally with some speed?

When you jump from an elevated position you usually bend your knees upon reaching the ground. by doing this, you make the time of the impact about 10 times as great as for a stiff-legged landing. in this way the average force your body experiences is a) less than 1/10 as great. b) more than 1/10 as great. c) about 1/10 as great.d) about 10 times as great.