Physics - November 2006

dose its acceleration increase, decrease, or remain constant?

2006-11-08 15:52:46 · 9 answers · asked by lena 1

what is its acceleration just before it hits the ground?

2006-11-08 15:46:57 · 3 answers · asked by lena 1

A 1055 kg van, stopped at a traffic light, is hit directly in the rear by a 655 kg car traveling with a velocity of +2.25 m/s. Assume that the transmission of the van is in neutral, the brakes are not being applied, and the collision is elastic. What is the final velocity of each vehicle?

a) car
m/s
(b) van
m/s

2006-11-08 15:43:49 · 2 answers · asked by Jim E 1

Basically, would we be able to see the lights before the car, like we normally do on the road, or would it all go too fast?

2006-11-08 15:42:17 · 7 answers · asked by Jessica Q 1

what is its acceleration when it reaches its maximum altitude?

2006-11-08 15:33:41 · 9 answers · asked by lena 1

what is its velocity when it reaches its maximum altitude?

2006-11-08 15:29:07 · 2 answers · asked by lena 1

what happens to the ball's velocity while the ball is in the air?

2006-11-08 15:11:23 · 2 answers · asked by lena 1

What is the formula of kinetic friction? (not the coefficient of kinetic fiction)

2006-11-08 14:52:12 · 2 answers · asked by Kristian C 1

I really could use some help on this problem. Thanks for any help on it! This is a college physics problem.

If the system (shown in the figure linked below) is set in rotation about each of the axes listed below, find the torque that will produce an angular acceleration of 2.7 rad/s2 in each case.

http://www.webassign.net/sercp/p8-29.gif

____ N x m (x axis)
____ N x m (y axis)
____ N x m (axis through O and perpendicular to the page)

2006-11-08 14:51:10 · 3 answers · asked by Amara 1

I'm not even sure where to begin.

To help study damage to an aircraft that collide with birds you design a test gun that will accelertae chicken sized objects so that their displacement along the gun barrel is given by
X=(9.0*10^3m/s^2)t^2-(8.0*10^4m/s^3)t^3
The object leaves the end of the barrel at t=0.03 s.

a) How long must the gun barrel be.
b) What will be the speed of the object as they leave the end of the barrel.
c)What net force must be exerted on a 1.5kg object at t=0.03s.

2006-11-08 14:43:48 · 2 answers · asked by lpfanz89 1

how should linearized acceleration vs. mass graph be equivalent to the net force? and how can the slope of the acceleration vs. net force graph be equivalent to one over the mass? please explain (in simple terms due to continually brain damage for the last few weeks @_@)
would be thankful for any answers

2006-11-08 14:41:08 · 2 answers · asked by mooshie 1

An elevator in a tall building is allowed to reach a maximum speed of 3.3 m/s going down. What must the tension be in the cable to stop this elevator over a distance of 3.5 m if the elevator has a mass of 1320 kg including occupants?

2006-11-08 14:40:13 · 3 answers · asked by Emily J 1

A 31.0 kg block is connected to an empty 1.00 kg bucket by a cord running over a frictionless pulley (Fig. 4-57). The coefficient of static friction between the table and the block is 0.425 and the coefficient of kinetic friction between the table and the block is 0.320. Sand is gradually added to the bucket until the system just begins to move.

2006-11-08 14:33:06 · 2 answers · asked by Emily J 1

A bicyclist can coast down a 5° hill at a constant 5.0 km/h. Assume the force of friction (air resistance) is proportional to the speed v so that Ffr = cv.

(b)What is the average force that must be applied in order to descend the hill at 18 km/h? The mass of the cyclist plus bicycle is 76 kg.

2006-11-08 14:32:02 · 2 answers · asked by Emily J 1

2006-11-08 14:25:05 · 9 answers · asked by kam0361 1

please guys if u can explain this in 1 para. it be a great help.

2006-11-08 14:08:04 · 3 answers · asked by kewl_dave_us_05 2

does friction affect rotational velocity?

2006-11-08 14:07:10 · 2 answers · asked by Wesley Y 1

A simple pendulum with a length 1.50 m makes 38.7 oscillations in 180 s. What is the acceleration due to gravity at its location? (It is not located on Earth!)

2006-11-08 14:01:58 · 1 answers · asked by Anonymous

A rod suspended on its end and acting as a physical pendulum swings with a period of 1.03 s. What is its length? (g = 9.80 m/s2)

2006-11-08 13:58:53 · 2 answers · asked by Anonymous

emissivity, absorptivity,black body

2006-11-08 13:53:54 · 4 answers · asked by DEV 1

.A car with a mass of 2400kg is driving along at 23m/s. It hits its breaks and skids to a stop. The coefficient of kinetic friction is 0.41, how far does it travel?

2006-11-08 13:32:58 · 3 answers · asked by Nick G 2

nothing. the match cant spark without oxygen

2006-11-08 13:28:13 · 7 answers · asked by Anonymous

2006-11-08 13:04:51 · 2 answers · asked by Eric Inri 6

such as silicon, or germanium.

2006-11-08 12:50:27 · 4 answers · asked by littlelorenbree 1

You are shadowing a nurse in the emergency room of a local hospital. An orderly wheels in a patient who has..?
You are shadowing a nurse in the emergency room of a local hospital. An orderly wheels in a patient who has been in a very serious accident and has had severe bleeding. The nurse quickly explains to you that in a case like this, the patient's bed will be tilted with the head downward to make sure the brain gets enough blood. She tells you that, for most patients, the largest angle that the bed can be tilted without the patient beginning to slide off is 32.0 degrees from the horizontal.

a. on what factor does this angle of tilting depend?
b. find the coefficient of static friction between a typical patient and the bed's sheets.

This problem is giving me trouble.
Please help me to understand it.

I have asked this question before, and have got confusing results.

2006-11-08 12:47:54 · 2 answers · asked by swimmertommy 1

I want 2 know 4 a science project who runs faster?

2006-11-08 12:38:55 · 15 answers · asked by oodles 'n noodles 1

I need to know what number neon was

2006-11-08 12:33:24 · 3 answers · asked by luckystar53 3

2006-11-08 12:23:12 · 0 answers · asked by Anonymous

2006-11-08 12:14:50 · 2 answers · asked by vicky p 1

2006-11-08 12:05:34 · 14 answers · asked by oldcrimson53 1