Tagged Questions
2
votes
1answer
68 views
Convert a 200mm linear stroke into 90 degrees motion
Can anyone help me Convert a 200 mm linear stroke into 90 degrees motion with as much mechanical advantage as possible or into two 90 degrees motions with as much mechanical advantage as possible?
...
-2
votes
1answer
124 views
Newton first law of motion, braking suddenly in car
While driving down the road, if you hit the brakes suddenly, your body moves forward. Explain the reason for this.
1
vote
2answers
112 views
How does this chair move?
I have a chair like this(shown in figure). I was kneeling on the part where we sit. I just gave a sudden push to the part where we rest the back, without moving my legs. I found that the chair is ...
7
votes
1answer
250 views
One strategy in a snowball fight
Here's a common college physics problem:
One strategy in a snowball fight is to throw a first snowball at a
high angle over level ground. While your opponent is watching the
first one, you ...
2
votes
0answers
30 views
One dimensional motion with changing acceleration. Falling to a large body from a great distance [duplicate]
Possible Duplicate:
Radial fall in a Newtonian gravitational field
My math and physics are rusty. I am trying to calculate the time an object takes to fall to a large body. Before you ...
0
votes
2answers
149 views
Understanding the concept of period of motion in simple harmonic motion formula
I have a spring system, whose position equation is $$x(t) = c_1cos(8 \sqrt{2}t) + c_2sin(8 \sqrt{2}t)$$
The textbook says it will have a period of motion of $\frac{2 \pi}{(8 \sqrt{2}t)}$. I ...
2
votes
2answers
898 views
Do the physics in the FlyBoard video make sense?
If you haven't seen the video of the FlyBoard, please have a look: http://www.youtube.com/watch?v=Cd6C1vIyQ3w&feature=youtube_gdata_player
Yes, it's amazing, but do the physics make sense or is ...
1
vote
2answers
147 views
Motion of a rod struck at one end
Imagine a strong metal rod of uniform density and thickness floating in a weightless environment. Imagine it lies on an X-Y plane, with one end (A) lying at 0,0, and the other end (B) at 0,1. Then it ...
0
votes
4answers
241 views
A person weighing 100 N stands on some bathroom scales in a lift. If the scales show a reading of 110 N, which way is he going
Can someone answer and explain it please.
Here are the options:
Moving downwards and decelerating.
Moving downwards with a constant velocity.
Moving upwards and decelerating.
Moving upwards with a ...
1
vote
2answers
1k views
Finding distance when the force is a function of time
I'm having trouble with this homework question
A mysterious rocket-propelled object of mass 49.0 kg is initially at rest in the middle of the horizontal, frictionless surface of an ice-covered ...
0
votes
1answer
177 views
Laws of Motion: Acceleration to be applied on a free falling object to reduce velocity to 0
Assume that an object of mass 'm' is falling to the earth.The force acting on the same would be F = m*g = 10m (assuming g = 10m/s^2). In this case the velocity of the object at time 't' = 10 seconds ...
1
vote
1answer
2k views
How to prove that a motion is Simple Harmonic Motion (SHM)?
I would like to know how one could show and prove that a given motion is simple harmonic motion.
Once given an answer, I'll apply that technique to an example I am trying to figure out.
Thank you ...
20
votes
4answers
3k views
How does a mobile phone vibrate without any external force?
How does a mobile phone vibrate without any external force? By Newton's law, any body can't move without any external force
7
votes
3answers
1k views
Static Friction - Only thing that can accelerate a train?
I'm a computer programmer that never studied physics in school and now it's coming back to bite me a bit in some of the stuff I'm being asked to program. I'm trying to self study some physics and ...
