When practicing an oral presentation, you want to make sure to do all of the following except speak with confidence. smile at your audience. read from your notes. speak slowly and clearly.

When you push downward on a book at rest on a table, you feel an upward force. does this force depend on friction? defend your answer.

Abucket full of water weights 4 kg and water well is 10m deep. a girl draws water from the well. it takes the girl 3 minutes to draw a bucket full of water from the well. what is the power of the girl?

Arunner is training for an upcoming marathon by running around a 100-m-diameter circular track at constant speed. let a coordinate system have its origin at the center of the circle with the x-axis pointing east and the y-axis north. the runner starts at (x, y) = (50 m, 0 m) and runs 2.5 times around the track in a clockwise direction.