Physics - November 2006

Through what angle, in radians, does the wheel rotate in 1.0s?

2006-11-19 10:48:36 · 4 answers · asked by Moose 2

FOR EXAMPLE A CAR WEIGHS 2500 LBS AND IS TRAVELING 65 MPH HOW DO YOU FIGURE OUT ITS FORCE

2006-11-19 10:32:13 · 4 answers · asked by Anonymous

2006-11-19 10:17:59 · 6 answers · asked by merviedz trespassers 3

A proton with mass 1.67 *10^-27 kg moving with a velocity of 4.46 * 10^6 m/s straight up.

_____kg*m/s upward

i know it's momentum = mass x velocity but i'm kinda confused with the powers of 10.

2006-11-19 10:15:06 · 4 answers · asked by tingerpoo 2

1/s'=(1/f)-(1-s)

what would s' be.

i thought you would just have to invert each one and get s'=f-s but that is not the case.

2006-11-19 10:14:16 · 2 answers · asked by ElDarado05 2

2006-11-19 10:11:41 · 2 answers · asked by melanie m 1

How can a spark flash just from a simple hit? Can someone explain that to me like I'm a 5 year old?

2006-11-19 10:09:08 · 4 answers · asked by Anonymous

2006-11-19 09:59:04 · 4 answers · asked by merviedz trespassers 3

Just like vanishing act or becoming invisible. can be compared with a 'startrek' style phenomena.

2006-11-19 09:54:16 · 5 answers · asked by MAHESH 1

Need help with this problem. Someone please explain. Thanks a lot!

You have a boat with a motor that propels it at vboat = 4.5 m/s relative to the water. You point it directly across the river and find that when you reach the other side, you have traveled a total distance of 27 m and wound up 14 m downstream. What is the speed of the current?

2006-11-19 09:51:07 · 3 answers · asked by venom90011@sbcglobal.net 1

A box slides down a 34.0° ramp with an acceleration of 1.22 m/s2. Determine the coefficient of kinetic friction between the box and the ramp.
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A person pushes a shopping cart with a force of 91 N acting down at 45°. If the cart travels at a constant speed of 1.4 m/s, what is the value of the combined retarding force acting horizontally on the cart due to friction and air drag? [Hint: It is the horizontal component of the force that drives the cart forward. The constant speed tells you that Fx = ma = 0.]
N
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You slide a 325-N trunk up a 19.0° inclined plane with a constant velocity by exerting a force of 213 N parallel to the plane.
(a) What is the component of the trunk's weight parallel to the plane?
N
(b) What is the sum of your applied force, friction, and the parallel component of the trunk's weight?
N
Why?

2006-11-19 09:49:16 · 3 answers · asked by ckielblock18 1

A 36 kg crate, originally at rest, is dragged across a floor by pulling on a rope inclined 15° above the horizontal.The coefficients of static and kinetic friction are respectively µs=0.62 and µk = 0.53, and the tension in the rope is F=222 N.
(a) What is the magnitude of the normal force?
N
(b) What is the minimum horizontal force needed to start the crate?
N
(c)What is the magnitude of the friction force acting on the crate?
N
(d) What is the magnitude of the acceleration of the crate?
m/s2
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A 40.0 kg wagon is towed up a hill inclined at 18.8° with respect to the horizontal. The tow rope is parallel to the incline and has a tension of 140 N in it. Assume that the wagon starts from rest at the bottom of the hill, and neglect friction. How fast is the wagon going after moving 75 m up the hill?
m/s
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2006-11-19 09:46:39 · 1 answers · asked by ckielblock18 1

2006-11-19 09:25:12 · 3 answers · asked by Anonymous

Yes or no

2006-11-19 09:07:28 · 3 answers · asked by Anonymous

A dart player throws a dart horizontally at 12.4 m/s. The dart hits the board 0.32 m. below the height from which it was thrown. How far away is the player from the board?

Please help me with this problem.
I'm a confused.

2006-11-19 09:02:03 · 3 answers · asked by vicky p 1

If I run a sled into a target thirty feet away, does it bounce further if it absorbs more shock, or bounce a shorter distance if is absorbs more shock?

2006-11-19 09:01:39 · 3 answers · asked by Bunny Slippers 2

A 2.50 102-N force is pulling an 90.0-kg refrigerator across a horizontal surface. The force acts at an angle of 15.0° above the surface. The coefficient of kinetic friction is 0.200, and the refrigerator moves a distance of 5.00 m. Find

(b) the work done by the kinetic frictional force.

2006-11-19 09:00:41 · 1 answers · asked by Anonymous

You accidentally throw your car keys horizontally at 8.0 m/s from a cliff 64-m. high. How far from the base of the cliff should you look for the keys.

Please help me with this problem.
I'm having trouble.

I previously asked this question, but was confused with the results I received.

2006-11-19 08:58:28 · 2 answers · asked by vicky p 1

Ive been working on this all day, and seriously need some help!

Three masses are connected together by strings. Starting from left and going right, mass 1 is 12kg, mass 2 is 24kg, and mass 3 is 31kg. The force applied to the string attached to mass 3 and is pulling right is 65N. (a) Find the acceleration of the system (b) find the tension in the string between mass 1 and mass 2 (c) between mass 3 and mass 2. Assume no friction

2006-11-19 08:56:05 · 3 answers · asked by sur2124 4

yes or no and Y

Dont say i will die

2006-11-19 08:53:30 · 2 answers · asked by Anonymous

2006-11-19 08:51:05 · 1 answers · asked by LadyLeo 1

WWUD= what would you do
No screaming and No getting out of elevator
Its locked tight and your weightless
no jumping either cause they aint gonna work

2006-11-19 08:43:39 · 7 answers · asked by Anonymous

A copper block rests 30.0cm from the center of steel turntable. The coefficent of static friciton between the two is 0.53. The turntable start from rest and rotates with a constant angular acceleration of 0.50rad/s^2. After what time internal will the block start to slip on the turntable? (Hint: The normal force in this case equals the weight of the block.)

2006-11-19 08:26:37 · 2 answers · asked by lauren u 1

A website would be preffered, as I can't find one.

2006-11-19 08:25:57 · 1 answers · asked by Flippy 1

electromagnetic

2006-11-19 08:12:20 · 7 answers · asked by blink 1

2006-11-19 08:11:08 · 2 answers · asked by Anonymous

A bobsled team with a total mass of 198.4 kg leaves a run that begins 248.8 meters above the finish point. The bobsled takes 1 minute and 8 seconds to travel 2 km. What fraction of the sled's initial potential energy was converted to kinetic energy? (Ans = 18%)

Thanks in advance.

2006-11-19 08:09:07 · 1 answers · asked by Stev 1

(g=9.80ms^-2)

2006-11-19 07:53:03 · 9 answers · asked by mapleafgal sweet an delicious 1

Would a light beam that travels say 10m take less time than a light beam that travels 5m to a mirror gets reflected and travels 5m in the opposite direction?

I know light's velocity is constant but what happens at the point of reflection at the mirror at the photonic scale? Do the photons slow down to 0m/s then speed up in the other direction?

2006-11-19 07:44:38 · 4 answers · asked by benabean87 2

the question is:
in its approach to an airport ruway, an airplane of mass 1.24x10^5 kg has a velocity of 75.5 m/s [11.1 degrees below the horizontal] determine the horizontal and vertical components of its momentum

2006-11-19 07:43:00 · 3 answers · asked by M.K 2