Physics - June 2007

These questions are to put on my in class notecard for my physics final as an example. Any help would be greatly appreciated!!!!!

A marble rolls off a 1.10 m high table with a speed of 2.5 m/s
a. how long in air??
b. distance traveled horozontially

Carl pulls a cart with a 65 N force above the horozontial
a. calculate horozontial and vertical components
b. if the cart moves 11.5 m, how much work does carl do?

Henry pulls a .45 kg toy with a X direction applied force of 3.2 N. Moves with a constant velocity.
a. net force in Y direction
b. calculate normal force
c. net force in x direction
d. force of friction
e. calculate coefficient of friction

Thanks!!!!!!! This will be of extrodinary help

2007-06-07 12:21:15 · 1 answers · asked by wjo00 1

A record of travel along a straight path is as follows.


1. Start from rest with constant acceleration of 2.77 m/s2 for 15.0 s.
2. Maintain a constant velocity for the next 2.05 min.
3. Apply a constant negative acceleration of -9.47 m/s2 for 4.39 s.



(a) What was the total displacement for the trip?

(b) What were the average speeds for legs 1, 2, and 3 of the trip, as well as for the complete trip?

i would appreciate an explanation along with the calculations. thank you soo much.

2007-06-07 12:20:22 · 1 answers · asked by lenny b 1

A spacecraft drifts through space at a constant velocity. Suddenly, a gas leak in the side of the spacecraft gives it a constant acceleration in a direction perpendicular to the initial velocity. The orientation of the spacecraft does not change, so that the acceleration remains perpendicular to the original direction of the velocity. What is the shape of the path followed by the spacecraft in this situation?

parabola, circular, or linear?

2007-06-07 12:05:03 · 4 answers · asked by Chablisah 1

Since gravity can duplicate the effects of acceleration, it can also balance the effects of acceleration. Cite how and when an astronaut can experience no net force (as measured by a scale) because of the cancelling effects of gravity and acceleration.

2007-06-07 11:57:57 · 4 answers · asked by Anniepannie06 2

1. A rifle bullet with a muzzle speed of 360 m/s is fired directly into a special, dense material that stops the bullet in 28 cm. Assuming the bullet's deceleration to be constant, what is its magnitude? __ m/s^2

2. A 60 kg gymnast hangs vertically from a pair of parallel rings.

a If the ropes supporting the rings are attached to the ceiling directly above, what is the tension in each rope? __ N

b If the ropes are supported so that they make an angle of 40º with the ceiling, what is the tension in each rope? ___N

3. A 1500 kg automobile travels at a speed of 85 km/h.

a What is its kinetic energy? __ J

b What is the net work required to bring it to a stop? __ J

2007-06-07 11:54:48 · 2 answers · asked by Anonymous

when we look in the front of a spoon, why are we always upside down, not matter which way you turn it, n why not when you look in the back???

2007-06-07 11:37:20 · 5 answers · asked by Sara 1

so when there is a force applies on an object, and the object moves. Does it accelerates or moves at a constant speed?

2007-06-07 11:23:18 · 6 answers · asked by      7

a retailer finds that he can sell 2000 dvd players per month at R300. if he reduces his price to R250 per unit his sales increase to 2400 per month. find the demand relation, assuming it to be linear.

2007-06-07 10:51:45 · 3 answers · asked by Anonymous

what kind of instrument or range finder is needed to measure the distance to an object in space,when we are talking about billions of light years,the object may not even be there anymore.?

2007-06-07 10:03:15 · 6 answers · asked by heinz l 2

2007-06-07 09:41:41 · 4 answers · asked by johoih a 1

2007-06-07 09:40:25 · 4 answers · asked by Alexander 6

2007-06-07 09:38:14 · 7 answers · asked by Kain 5

And if water in the southern hemisphere drains counter clockwise, is there a point where there is no circular motion while water is draining?

2007-06-07 09:19:52 · 8 answers · asked by don122850 2

which has the higher frequency

2007-06-07 09:06:32 · 9 answers · asked by Lou 1

If a rock takes 7.5 seconds for it to fall, hit the ground, the the sound to bounce back up, what is the height it fell from? If someone could explain to me how to solve this (and dumb it down, because I don't understand physics at all...) THANKS.

2007-06-07 08:50:03 · 3 answers · asked by protege moi 3

In France, they have a large array of reflective mirrors that focus the suns beams on a central point, generating heat and, thus, electricity.

That got me to wondering....

If I took a single light bulb and used magnifying glasses and mirrors and such, could I produce enough heat to, say, boil a small amount of water (producing steam)?

Or how about this: Could I take that single light bulb and, using mirrors and magnifcation, light and entire home? a stadium? a city?

That is, IF, IF, IF I could use fiber optics and so forth, just what could be done with a single light bulb?

Is any of this possible? Could a single light bulb perhaps generate enough electricity to light itself, or at least offset some of the power usage? Thoughts?

2007-06-07 08:26:14 · 11 answers · asked by Anonymous

2007-06-07 08:00:22 · 23 answers · asked by raorbe40 1

Not things that can happen, but categories?

2007-06-07 07:51:45 · 2 answers · asked by Anonymous

2007-06-07 07:42:36 · 5 answers · asked by Abongasport 3

I have often heard that the circle or sphere is the most energy efficient shape found in nature. Is this true, and is it the most structually sound or efficient shape?

2007-06-07 07:09:15 · 6 answers · asked by Alex 1

My mother recently insisted we have our wireless internet connection replaced with a wired one because she could 'feel' the vibrations and 'heard a ringing in her ear' from it. I'm under the impression there are a number of ambient waves (ie: radio signals) both naturally occurring and otherwise that would have much more of an appreciable effect on the body then a short-range wireless G signal. Whose nuts, her or I? Aren't the effects on the body from such a signal neglible, imperceptible and deemed safe by the FCC. Can someone perhaps quantify or validate my intutions for me? thanks.

2007-06-07 07:06:50 · 3 answers · asked by Andy S 6

2007-06-07 06:56:33 · 8 answers · asked by Anonymous

Ceftazidime 1 g is ordered to be infused through an IMED (pump) that is currently infusing NS at 70 cc/hr. Ceftazidime is supplied 1g in 50 ml and is to be infused over 30 minutes. What is the secondary rate you will set in the pump (cc/hr)?

2007-06-07 06:51:05 · 1 answers · asked by treatyourself_well 1

this is the question of physics of BSc level

2007-06-07 06:35:39 · 3 answers · asked by ahmad 1

is made of the same stuff, it seems very very likely that life could arise from the same processes as seen here on earth. It seems to me that the probability of there being no life (even simple single cell life) in the universe as being extremely low. How many agree with this? Do you think we will find habitable planets near the closest star, and MAYBE some simple life on the moons of jupiter? I keep hearing about the oceans on Io, and how the volcanic activity could heat the water beneath the ice etc etc. What do you think?

2007-06-07 06:03:01 · 2 answers · asked by ? 2

2007-06-07 05:39:21 · 6 answers · asked by Anonymous

I often times have difficulty putting my thoughts into words and am asked a question by the answerer. Is there a acceptable method for me to respond?

2007-06-07 05:34:08 · 6 answers · asked by james h 2

2007-06-07 05:26:01 · 5 answers · asked by Nathan K 1

i need to know this for science class

2007-06-07 05:23:34 · 1 answers · asked by joy w 1

If your car is stopped at a red light and there is a fly in you car flying around right by your rear view mirror and then you take off does the fly shoot towards the back of the car or continue to fly in the front of the vehicle. This is my friends question and he has asked teacher and no one knows the answer.

2007-06-07 05:06:46 · 6 answers · asked by toddwhite88 2