Question

STAPL STAP Rotation Homework 2 in2rque to the left on the top of a ball, what direction will the ball rotate in? (clockwise or counterclockwise) EXPLAIN. 2.) A common amusement park ride has you stand against a wall, the ride begins to spin, you. and you feel pressed against the wall. Explain what forces are acting on 3.) You have 2 screwdrivers available to you. One has a thick handle, and the other has a long handle a.) Which is better for opening a tough can of paint? Explain. b.) Which is better for removing a stuck screw? Explain. 4.) Explain why you cannot stand with your heels and legs against a wall and bend over to touch your toes without falling over. 5.) A car is driving on a road that is tilted at a 150 angle so that the car can turn around a curve. a.) The car feels a force that is perpendicular to the road, what component cof b.) If the car also speeds up, with the wheel turned 20° towards the center this force will provide a centripetal force? what fraction of this acceleration will be a torque?

Answer 1

1)applied force is towards left. force is applied at top of ball. Torque due to applied force ,about center of ball, is counterclockwise

Ball will rotate counterclockwise

2)Forces acting on the person are centrifugal force acting radially outwards and normal force exerted by wall on the person

3)For opening can of paint, the lever arm that will help is length of handle. Therefore longer handle will help

For removing a stuck screw, the lever arm that will help is thickness of handle. Therefore, thicker handle will help