## Linear and Rotational Quantities Conceptual Question

Question
A merry-go-round is rotating at constant angular speed. Two children are riding the merry-go-round: Alan is riding at point A and Isamu is riding at point B.   A) Which child moves with greater magnitude of velocity?   B) Who moves with greater magnitude ...
solved 0
General Physics 2 years 1 Answer 1509 views

## Net Torque on a Pulley

Question
The figure below shows two blocks suspended by a cord over a pulley. The mass of block B is twice the mass of block A, while the mass of the pulley is equal to the mass of block A. The ...
solved 0
General Physics 2 years 1 Answer 2674 views

## Pivoted Rod with Unequal Masses

Question
The figure shows a simple model of a seesaw. These consist of a plank/rod of mass mr and length 2x allowed to pivot freely about its center (or central axis), as shown in the diagram. A small sphere of mass m1 is attached to ...
solved 0
General Physics 2 years 1 Answer 3862 views

## Playing in the Field

Question
Four children are playing in a field. The children form a line, holding hands. The player at the front of the line starts to spin around faster and faster, causing the others to run in circle, as shown in the ...
solved 0
General Physics 2 years 1 Answer 1991 views

Question
The wrench in the figure has six forces of equal magnitude acting on it. A) Rank these forces (A through F) on the basis of the magnitude of the torque ...
solved 0
General Physics 2 years 1 Answer 6067 views

## Torque and Angular Acceleration

Question
Learning Goal: To understand and apply the formula τ =Iɑ to rigid objects rotating about a fixed axis. To find the acceleration ɑ of a particle of mass m, we use Newton’s second law: , where
solved 0
General Physics 2 years 1 Answer 4463 views

## What is the Average Velocity of the Ball?

Question
A tennis ball with a velocity of 11.4 m/s to the right is thrown perpendicularly at a wall. After striking the wall, the ball rebounds in the opposite direction with a velocity of -10.1 m/s to the left. If the ...
solved 0
General Physics 2 years 1 Answer 528 views

## A 18.1-kg block and a 32.6-kg block are resting on a horizontal frictionless surface.

Question
A 18.1-kg block and a 32.6-kg block are resting on a horizontal frictionless surface. Between the two is squeezed a spring (spring constant = 1580 N/m). The spring is compressed by 0.160 m from its unstrained length and is not ...
solved 0
General Physics 2 years 1 Answer 570 views

## A pencil sharpener takes 1.4 seconds to go from its maximum speed of 8π rad/s to rest.

Question
A pencil sharpener takes 1.4 seconds to go from its maximum speed of 8π rad/s to rest. How many rotations will the pencil sharpener make before it stops? Starting from rest. A DVD takes 0.2 seconds to get its maximum rotational ...
solved 0
General Physics 2 years 1 Answer 630 views

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

Question
Distance=2 Time=1.17 seconds Angle= 30 degrees What is the Average Velocity?
solved 0
General Physics 2 years 1 Answer 657 views

## Is gravity real?

Question
How are we gonna trust gravity if the guy who made it up,Isaac Newton, died a virgin?
in progress 0
General Physics 2 years 1 Answer 369 views

## Velocity of a Roller Coaster Ranking Task

Question
Six roller-coaster carts pass over the same semicircular “bump.” The mass M of each cart (including passenger) and the normal force n of the track on the cart at the top of each bump are given in the figures. Rank the speeds of ...
solved 0
General Physics 2 years 1 Answer 662 views

## A 22000 kg subway train initially traveling at 10.0 m/s slows to a stop in a station and then stays there long enough for its brakes to cool. The station’s dimensions are 65.0 m long by 20.0 mwide by 12.0 m high.

Question
A 22000 kg subway train initially traveling at 10.0 m/s slows to a stop in a station and then stays there long enough for its brakes to cool. The station’s dimensions are 65.0 m long by 20.0 mwide by 12.0 ...
solved 0
General Physics 2 years 1 Answer 545 views

## Actual Mechanical Advantage of a system?

Question
The system is a pair of tweezers and the user is applying 1 pound to it but if 1/5 pound reaches the splinter it would shatter and wouldn’t be able to move
in progress 0
General Physics 2 years 1 Answer 318 views

## Spacetime question?

Question
My current picture of how gravity works is this (its probably wrong because it doesnt work for light. I’d like a better explanation from you guys): objects have to move in the speed of light in space ...
in progress 0
General Physics 2 years 1 Answer 312 views

## If a feather is dropped from a height, would its apparent weight be equal to its true weight or zero as in weightlessness.?

Question
I understand that the drag force acting on the feather would be abundant so it would reach terminal velocity soon and thus a = 0 So, apparent weight = m(g-a) = true weight. But what bothers me is ...
in progress 0
General Physics 2 years 1 Answer 276 views

## By how much is her speedometer off? in MPH

Question
Shannon decides to check the accuracy of her speedometer. She adjusts her speed to read exactly 70 mph on her speedometer and holds this ...
0
General Physics 2 years 0 Answers 3580 views

## I’m trying to understand voltage?

Question
I have understood that voltage is how much energy is carried by the current but say you had current of 10A carrying 20V, does that mean amp of current is carrying 20V or does that mean that the ...
0
General Physics 2 years 0 Answers 707 views

## Physics

Question
Keira starts at position x = 23 m along a coordinate axis. She then undergoes a displacement of -45 m. What is her final position?
0
General Physics 1 year 0 Answers 1245 views

## 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 ...
0
General Physics 2 years 0 Answers 1453 views

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

No Questions Found.

## Why has it proven so hard to find new cutting edge physics beyond the standard model at the LHC?

Question
Is it more likely to come from gravitational waves and a possible black hole fire wall discovery than the LHC? Will the LHC ever find new physics beyond the standard model?
in progress 0
General Physics 2 years 1 Answer 292 views

## In calculating the intensity of a diffraction pattern using Xray powder method,what are the factors that you have to consider?

Question
In calculating the intensity of a diffraction pattern using Xray powder method,what are the factors that you have to consider? Please list them and describe them.
solved 0
General Physics 2 years 1 Answer 290 views

## Why is the sky blue?

Question
I’ve gotten different answers and want to know for sure.
in progress 0
General Physics 2 years 1 Answer 287 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 ...
in progress 0
General Physics 2 years 1 Answer 283 views

## Why is acceleration measured in m/s per second?

Question
And what does meters per second mean?
in progress 0
General Physics 2 years 1 Answer 283 views

## Why the earth s megnetic north pole is called north and not south where is actually?

Question
Because, of the compass needle is a magnet and the arrow (red color usually) is the north pole of this magnet can t be attracted from the north pole of the earth but from the south pole of ...
in progress 0
General Physics 2 years 1 Answer 280 views

## What’s the speed of dark?

Question
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 ...
in progress 0
General Physics 2 years 1 Answer 279 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 ...
solved 0
General Physics 2 years 1 Answer 279 views

## If matter consists of inanimate objects how is it that these inanimate objects are responsible for becoming alive?

Question
Update: people get mad when they get sick or die, but how can matter be responsible? Is there a force/power causing matter to become alive?
in progress 0
General Physics 2 years 1 Answer 278 views

## Does a field ever finish? (physics)?

Question
I have been thinking about gravity and magnetic force, and seeing that these two forces have a field, does their field ever finish. For example, the Earth’s gravity field weakens the further you go from the Earth, but ...
in progress 0
General Physics 2 years 1 Answer 277 views