## Tactics Box 9.1 Drawing a Before-and-After Visual Overview

Question
Learning Goal: To practice Tactics Box 9.1 Drawing a before-and-after visual overview. During a collision, two objects exert forces on each other that vary in a complex way during the time of the collision. Using Newton’s second law to predict the outcome ...
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General Physics 5 years 0 Answers 2964 views

## Equilibrium of a Mobile Conceptual Question

Question
The artist Anya Calderona constructs the mobile shown in the figure. In the illustrated configuration, the mobile is perfectly balanced. A) If Anya decides to make the star ...
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General Physics 5 years 2 Answers 3738 views

## PhET Tutorial: Masses & Springs

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Learning Goal: To understand how the motion and energetics of a weight attached to a vertical spring depend on the mass, the spring constant, and initial conditions. For this tutorial, use the PhET simulation Masses & Springs. You can put a weight on ...
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General Physics 5 years 1 Answer 1351 views

## Torques on a Seesaw: A Tutorial

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Learning Goal: To make the connection between intuitive understanding of a seesaw and the standard formalism for torque. This problem deals with the concept of torque, the “twist” that an off-center force applies to a body that tends to make it rotate.
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General Physics 5 years 1 Answer 3336 views

## Kinetic Energy and Momentum Conceptual Question

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The two toy cars shown in the figure, with masses as given in the figure, are ready to race. Both cars begin from rest. For each question, state whether the correct answer is car A, car B, or whether the ...
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General Physics 5 years 1 Answer 1324 views

## Projectile Motion and Conservation of Energy Ranking Task

Question
Six baseball throws are shown below. In each case the baseball is thrown at the same initial speed and from the same height H above the ground. Assume that the effects of air resistance are negligible. Rank these throws according to the ...
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General Physics 5 years 1 Answer 1725 views

## Work and Kinetic Energy

Question
Two blocks of ice, one four times as heavy as the other, are at rest on a frozen lake. A person pushes each block the same distance d. Ignore friction and assume that an equal force
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General Physics 5 years 1 Answer 1097 views

## A Mass on a Turntable: Conceptual

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(Intro 1 figure) A small metal cylinder rests on a circular turntable that is rotating at a constant rate, as illustrated in the diagram. Part A
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General Physics 5 years 1 Answer 1666 views

## Accelerating along a Racetrack

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A road race is taking place along the track shown in the figure . All of the cars are moving at constant speeds. The car at point F is traveling along a straight section of the track, whereas all the ...
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General Physics 5 years 1 Answer 1035 views

## Math Box: Inverse-Square Relationships

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Learning Goal: To understand and use inverse-square relationships. Two quantities have an inverse-square relationship if y is inversely proportional to the square of x. We write the mathematical relationship as y = A/x2. Here, A is a constant. This relationship is sometimes written as
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General Physics 5 years 1 Answer 3477 views

## How to get the average velocity if the angle, distance and time are given?

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Distance=2 Time=1.17 seconds Angle= 30 degrees What is the Average Velocity?
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General Physics 5 years 1 Answer 1098 views

## A cue stick hits a cue ball horizontally a distance x above the centre of the ball, as in the diagram below.

Question
A cue stick hits a cue ball horizontally a distance x above the centre of the ball, as in the diagram below. The cue ball is on a smooth horizontal surface. You may assume that the cue ball is a ...
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General Physics 5 years 1 Answer 1344 views

## Why are whites obsessed with general relativity?

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Scientists in Asia and the Middle East seem to be more interested in experimental and quantum physics. Things that have current commercial application. Whites seem obsessed with the stream of physics that involve spacetime. Even at an undergraduate level, ...
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General Physics 5 years 1 Answer 952 views

## Is there a way to calculate how much calories are burnt when you run?

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I want formulas. I know that kinetic energy equals 1/2mv2, could it be calculated with this? Let s say for instance that I run 500 meters in a time 500 seconds. How would I ...
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General Physics 5 years 1 Answer 661 views

## Explain why the average power delivered to a resistor is not zero?

Question
The average current in a resistor in an ac circuit is zero. Explain why the average power delivered to a resistor is not zero.
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General Physics 5 years 1 Answer 3442 views

## Draw the corresponding position-versus-time graph for the velocity-versus-time graph shown in the figure. Assume that x=0m at t=0s. (Figure 1)

Question
Draw the corresponding position-versus-time graph for the velocity-versus-time graph shown in the figure. Assume that x=0mx=0m at t=0st=0s. (Figure 1)
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General Physics 2 years 0 Answers 1506 views

## You drive 4 km at 30 km/hr and then another 4 km at 50 km/h. What is your average speed for the whole 8 km trip?

Question
You drive 4 km at 30 km/hr and then another 4 km at 50 km/h. What is your average speed for the whole 8 km trip? a.less than 40 km/h b.equal to 40 km/h c.more than 40 km/h d.none of the above
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General Physics 5 years 0 Answers 2007 views

## What are the Types of Learning Management Systems?

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Open-source learning management system Any requirement can be adjusted using a free, open-source learning management system. It also implies you’ll need a professional specialist to create a custom learning management system from scratch. It’s also possible that there won’t be ...
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General Physics 2 months 0 Answers 109 views

## Where can I buy countertops in Vancouver?

Question
At Century Cabinet, we specialize in the fabrication and installation of premium countertops and solid surfaces for residential and commercial applications. Century Cabinet countertop surfaces are designed to combine the quality and durability you need for everyday life with the colors ...
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General Physics 1 year 0 Answers 442 views

10. ### In reaching her destination, a backpacker walks with an average velocity of 1.27 m/s, due west.

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## Suvat Question?

Question
An aircraft lands on a runway at a velocity of 40 m s-1 and brakes to a halt in a distance of 860 m. Calculate a) the breaking time b) the deceleration of the aircraft
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General Physics 5 years 1 Answer 713 views

## light traveling horizontally proceeds through two polarizing sheets.

Question
Unpolarized light enters the first sheet which has it’s transmission axis oriented vertically. The transmitted light falls on a second sheet which has its transmission axis set at 55 degrees with respect to the first sheet. What percentage of the ...
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General Physics 5 years 1 Answer 712 views

## Was this designed? or can evolution be credited? The Resilient Brain of the Arctic Ground Squirrel?

Question
AS A hibernating animal begins its sleep, its body temperature cools. Arctic ground squirrels body temperature drops to 26.8 degrees Fahrenheit. Every two or three weeks during hibernation, the arctic ground squirrel shivers itself ...
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General Physics 5 years 1 Answer 709 views

## Physics problem with block attached to rope?

Question
A 1kg block is at rest on the floor while a rope is pulling on it applying a force of 5N at an angle of 30 degrees above the horizontal. What is the magnitude and direction of the normal force ...
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General Physics 5 years 1 Answer 707 views

## Stephen Hawking hopes that time travel is impossible, and hopes there’s a law of physics against it. But isn’t there already one?

Question
Why would he need to hope there is a law against time travel, when quite clearly the Lorentz Gamma Factor in Special Relativity, quite obviously rules out backwards time travel? If you can go ...
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General Physics 5 years 1 Answer 707 views

## Would 7 Men Have The Physical Strength To Tip A Van Over?

Question
I have a Dodge minivan. Do you think 7 men would have the physical strength to tip it over if they all started pushing?
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General Physics 5 years 1 Answer 705 views

## Why does pressure in a liquid not depend on the volume?

Question
Don’t include equations/ proofs in your answer, I want to know why does it physically/qualitatively make sense that the pressure in a liquid does not depend on the volume.
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General Physics 5 years 1 Answer 699 views

## Can I light a bundle of string on fire with a match on my asphalt driveway?

Question
So, I have a bundle of string, and I wanna do something creative with it instead of just throwing it away. So what do I come up with? BURN IT. The question is if I can, while ...
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General Physics 5 years 1 Answer 697 views

## What’s the speed of dark?

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I have two thoughts on this. One, the speed of dark is the same as light. two, the speed of dark is infinite and we can’t observe it because it only replaces light as fast as the light ...
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General Physics 5 years 1 Answer 695 views

## Do spherical objects with the same radius, but with diferent densities fall with the same speed and acceleration?

Question
Taking into account different masses and the square law of drag. Do they fall through the air at the same time or not?
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General Physics 5 years 1 Answer 693 views