Physics - November 2006

2006-11-07 10:29:32 · 4 answers · asked by socialchick416 1

You push a 25kg wooden box across a wooden floor at a constant speed of 1 m/s. The kinetic coefficient of friction between the crate and floor is .20. How much force do you exert on the box?

I was out for a few days... and I have no idea how to find the answer.

2006-11-07 10:27:13 · 2 answers · asked by Jer G 3

2006-11-07 10:23:50 · 3 answers · asked by glen_D 2

2006-11-07 10:01:17 · 4 answers · asked by Melissa I 1

Newtons?

2006-11-07 09:54:26 · 5 answers · asked by Anonymous

In an amusement park ride called The Roundup, passengers stand inside a 18.0m -diameter rotating ring. After the ring has acquired sufficient speed, it tilts into a vertical plane,

Suppose the ring rotates once every 4.50 . If a rider's mass is 59.0 , with how much force does the ring push on her at the top of the ride?

Suppose the ring rotates once every 4.50 . If a rider's mass is 59.0 , with how much force does the ring push on her at the bottom of the ride?

What is the longest rotation period of the wheel that will prevent the riders from falling off at the top?

2006-11-07 09:52:28 · 1 answers · asked by iknowu2jan 3

a)what is the unbalanced force acting on it?
b)if the horizontal force exerted on the wheels by the road is 5600N, what force must be resisting the motion of the car?

2006-11-07 09:14:06 · 2 answers · asked by Joseph r 1

going 180 miles/hour = how many newtons? (what is the net force?)

2006-11-07 08:50:37 · 2 answers · asked by Anonymous

this is my understandig of the big bang first, all the matter in the universe was confined into an extreamly dense ball, then as its entropy increased it exploded. the universe began expanding rapidly and as matter began to collide planets and stars began to form. is this roughly correct? i am in 10th grade and have never taken a physics corse so forgive me for my inaccuracies.

2006-11-07 08:42:09 · 2 answers · asked by daniel T 3

School project

2006-11-07 08:40:58 · 5 answers · asked by bcb8504 3

a swimmer releases a 20kg rock from rest underwater. If the resistance and buoyancy provided by the water is 150N, how long will it take for the rock to fall 1m?

2006-11-07 08:39:22 · 8 answers · asked by Joseph r 1

How far will a stone travel over level ground if it is thrown upward at an angle of 26.0 degrees with respect to the horizontal and with a speed of 14.0 m/s?

2006-11-07 08:37:54 · 4 answers · asked by Anonymous

2006-11-07 08:23:43 · 18 answers · asked by lishowron162 1

A. Bounce some light into shadowed or shaded areas
B. induce the camera to crank up the exposure
C. totally prevent one side of the image from appearing brighter than the other
D. All of the above


FOR PHOTOGRAPHERS ONLY.. if you know other wise... please exsplain.. Thanks

and no critism please

2006-11-07 07:59:49 · 3 answers · asked by sarah n 1

2006-11-07 07:58:13 · 13 answers · asked by NS*whizzkid 1

a) If an object is already moving, is a force necessary to keep it going at constant velocity?
yes
b) what ONE WORD goes in the blank:
An obect in motion keeps going because it has __inertia__

inertia would be best described as... (CHOOSE ALL THAT APPLY)
mass
X resistance to change in velocity
X the tendency to maintain constant velocity
the force of gravity
X resistance to acceleration
a force within the object
a property of matter

Newton's first law states: When the _net force_ on an object is zero, the object will _maintain_ constant _velocity_.

Another way of saying this is that, if the total force on it equals zero, an object's _acceleration_ will also be zero.


a) What is the net force on an object if you exert 10 N to the right, 4 N to the left, and an additional 6 N to the left?
0 N no direction

b) If the object was going 15 m/s when you began to apply the forces, how far will it go in the following 2 sec?

2006-11-07 07:38:50 · 4 answers · asked by vintagex50s 2

2006-11-07 07:05:26 · 3 answers · asked by Mac 3

2006-11-07 07:04:04 · 10 answers · asked by Mac 3

The concept of gravity has always boggled my mind. But here's my hypothetical question: If you could did a hole to within ten feet of the center of the earth then how much gravity would there be? If I was at the exact center of the earth would I be weightless? I know the earth's inards are molten. This is purely hypotheticle.

2006-11-07 06:47:28 · 7 answers · asked by tumbleweed1954 6

For instance, is there a particular scientist who came up with this theory?

2006-11-07 06:39:25 · 4 answers · asked by Anonymous

2006-11-07 06:36:14 · 6 answers · asked by Anonymous

Please give me the answer of these questions ( as much as u can) and i will give u your ten points.

1) Use ideas of electromagnetic induction to explain how the input voltage is transformed into an output voltage. Use the 3 questions below to help u with your answer.

a)What happens in the primary coil?
b)What happens in the core?
c)what happens in the secondary coil?

2)Explain how in the transformer :
a) a continuously varying magnetic flux is produced in the primary coil.
b)the varying magnetic flux is passed from the primary to the secondary coil.
c)an e.m.f is generated across the secondary coil.

This question is not on transformer but if u can answer it it would be great.

Why should we not handle a radioactive source with bare hands.

2006-11-07 06:31:31 · 4 answers · asked by nauroze_hoath 2

A typical GPS (Global Positioning System) satellite orbits at an altitude of 4.1 107 m.
(a) Find the orbital period of such a satellite.
hours
(b) Find the orbital speed of such a satellite.
km/s

2006-11-07 06:23:18 · 2 answers · asked by amandajohnsonllc 1

An astronaut exploring a distant solar system lands on an unnamed planet with a radius of 2550 km. When the astronaut jumps upward with an initial speed of 3.51 m/s, she rises to a height of 0.72 m. What is the mass of the planet?
kg

2006-11-07 06:22:25 · 4 answers · asked by amandajohnsonllc 1

An elevator hangs from a cable that goes around a pulley of diameter 7.7 feet. If the elevator climbs 181 feet in 17.2 seconds at a constant speed, determine the angular velocity of the pulley in revolutions per second. Your answer must be accurate to three decimal places.

2006-11-07 06:20:48 · 2 answers · asked by AppleCard! 2

A bowling ball has a mass of 3.00 kg, a moment of inertia of 1.60 10-2 kgm2, and a radius of 0.100 m. If it rolls down the lane without slipping at a linear speed of 6.00 m/s, what is its total energy?

I wanted to assume that because it's rolling and moving it would have both rotational kinetic and translational kinetic energy so the formula would be:

KE = 1/2mv^2 + 1/2Iw^2
(1/2)(3)(6^2) + 1/2((1.60x10^-2)^2)(w^2)

and for w^2, I thought that I could use the tangential velocity of 6.00 m/s and set it equal to r/w. Which would give me a value of:
w= .1/6 = .0166666....

Plugging in all the numbers gives me KE = 54.0. I tried both 54 and 54000, since it wants it in J. Where did I go wrong?

2006-11-07 06:03:51 · 1 answers · asked by flossie116 4

unfortunatly I have to calculate it so saying that it is the same as the volume isn't going to help..becuase mass and volume are different.

2006-11-07 06:01:33 · 3 answers · asked by Alexx 2

2006-11-07 06:01:30 · 2 answers · asked by Super J 2

If you put hot water in a vacuum flask, it keeps it hot, if you put cold water in it keeps it cold, How does it know?

2006-11-07 05:37:01 · 11 answers · asked by Anonymous

if the average velocity of a duck is zero in a given time inteval, what can you say about the displacement of the duck for that interval?

2006-11-07 04:47:34 · 1 answers · asked by lena 1