Bloomfield - How Things Work (Homework)

James Finch

Physics - College, section 1, Fall 2010

Instructor: Dr. Friendly

Current Score: 5/5

Due: Friday, August 20, 2010 20:00 EDT

Question

Points

1	2	3	4	5
1	1	1	1	1

Total

5/5

Description

Here are some textbook questions from How Things Work: the Physics of Everyday Life 2/e by Bloomfield published by John Wiley & Sons, Inc. Click here for a list of all of the questions coded in WebAssign.

Instructions

This demo assignment allows many submissions and allows you to try another version of the same question for practice.

1. 1/1 points All Submissions Notes Question: Bloom2 1.TB.23.

Question part

Points

Submissions

1
1
11/50

Total

1/1

A carnival has a game which supposedly measures strength. When you pound on one end of a lever with a giant hammer, the lever tosses a metal ball up a tall, vertical track toward a bell located 15 feet above you. As the ball rises upward on the frictionless track, it experiences

an upward force that decreases steadily, but yet remains substantially greater than zero even when the ball hits the bell. no upward forces. a constant upward force that depends only on the inertia of the ball as it rises toward the bell. an upward force that decreases steadily and reaches zero exactly at the moment the ball hits the bell.

Your answer is correct.

2. 1/1 points All Submissions Notes Question: Bloom2 2.TB.20.

Question part

Points

Submissions

1
1
7/50

Total

1/1

You are practicing for the hammer-throw competition for the Olympics. You take a large weight on the end of a chain, and swing it in a circle above your head. To a friend looking down on you from above, the weight is traveling in a counter-clockwise circle. If you want the weight to travel directly forward, you should let go of the chain at a moment when the weight is located

almost directly in front of you, but still somewhat to your right. directly in front of you. directly to your right. almost directly to your right, but already somewhat in front of you as well.

Your answer is correct.

3. 1/1 points All Submissions Notes Question: Bloom2 3.TB.26.

Question part

Points

Submissions

1
1
5/50

Total

1/1

You are standing on a bathroom spring scale and decide to jump upward suddenly. As you jump, the scale reads more than your weight because

your weight rises during an upward jump and the scale correctly reports this temporary rise in weight. your total energy increases during a jump and the scale cannot distinguish between the energy associated with your weight (your gravitational potential energy) and the energy associated with your motion (your kinetic energy). your motion fools the scale's mechanical components so that it mistakenly reports a value that is larger than the force you are exerting on it. you are pushing down on the scale with a force greater than your weight.

Your answer is correct.

4. 1/1 points All Submissions Notes Question: Bloom2 4.TB.14.

Question part

Points

Submissions

1
1
8/50

Total

1/1

When a car suddenly stops, heavy objects move toward the front. What will a helium-filled balloon do when the car suddenly stops?

Move toward the front Remain motionless Move toward the rear Not enough information is given to determine.

Your answer is correct.

5. 1/1 points All Submissions Notes Question: Bloom2 5.TB.08.

Question part

Points

Submissions

1
1
3/50

Total

1/1

You have two golf balls that differ only in their surfaces. One has dimples, while the other is smooth. If you were to drop the balls simultaneously from the top of the Eiffel Tower, which will hit the ground first?

Whichever ball is heavier. Both hit at the same time. Dimpled ball. Smooth ball.

Your answer is correct.

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Bloomfield - How Things Work (Homework)

Current Score: 5/5