Introduction to Motion Answers
0 verified answers
21
Free Preview
The city is using sand trucks to place sand on the road during icy conditions. Which best explains the use of sand?
A
The sand increases friction by increasing surface area.B
The sand increases friction by increasing roughness.C
The sand decreases friction by increasing surface area.D
The sand decreases friction by increasing roughness.22
Free Preview
Alfredo makes a diagram to organize his notes about charging objects.
A
It does not involve touching the objects together.B
The objects develop opposite charges.C
Electrons do not move between objects.D
The objects have the same charge.23
Two bar magnets are hung from metal rods and held in the position shown below. The magnets are released and swing freely. Which diagram best predicts their final position?
A
A rectangular box with 2 black lines running down from it, each to a horizontal bar magnet labeled N to the left and S to the right. There is a gap between the magnets. The magnets are both hanging to the left.
B
A rectangular box with 2 black lines running down from it, each to a horizontal bar magnet labeled N to the left and S to the right. There is a gap between the magnets. The left magnet hangs to the left. The right magnet hangs to the right.
C
A rectangular box with 2 black lines running down from it, each to a horizontal bar magnet labeled N to the left and S to the right. There is a gap between the magnets. The left magnet hangs to the right. The right magnet hangs to the left.
D
A rectangular box with 2 black lines running down from it, each to a horizontal bar magnet labeled N to the left and S to the right. There is a gap between the magnets. The left magnet hangs straight down. The right magnet hangs to the right.
24
Which force best represents Fg?
A
A weight lifter is pushing a barbell upward with a force of 90 N.B
The weight of a barbell acting on a weight lifter is 80 N.C
The amount of upward force of a table on a box is 25 N.D
A box on a rough table has difficulty sliding past 25 N of force.25
Jill uses a magnet to pick up a nail. Then, she touches the nail to a paper clip and picks up the paper clip. What will most likely happen when she pulls the magnet away from the nail?
A
The paper clip will stay attached to the nail because the nail is now a permanent magnet.B
The paper clip will stay attached to the nail because the paper clip is now a permanent magnet.C
The paper clip will fall off of the nail because the nail was only a temporary magnet.D
The paper clip will fall off of the nail because the nail is now magnetized in the opposite direction.Did you find these answers helpful?
Verified answers available
TRY EDGENUITY HACKS
- Auto Complete Exams
- Auto Complete Assignments
- Skip Videos Instantly
50,000+ students using this