Accelerated motion Definition and 66 Threads

Homework Statement A driver slows her car from 33.5 km/hr at a constant rate of 0.29 m/s2 just by taking her foot of the accelerator (the "gas" pedal). Calculate the distance the car travels during the fifth second that she is coasting. Homework Equations The Attempt at a Solution...

Homework Statement A human throws a rock off of a bridge that is 30 meters above the water. It takes 3 seconds from the time the human throws the rock up in the air and falls all the way back down to the water. What is the initial velocity of the rock leaving the persons hand?Homework Equations...

Homework Statement A marble, rolling with speed 20cm/s, rolls off the edge of a table that is 80 cm high. (a) How long does it take to drop to the floor? (b) How far, horizontally, from the table edge does the marble strike the floor? Homework Equations y = y0 + vy0t - (1/2)gt2...

Homework Statement 1. A train moving at a speed of 30 m/s slows down to 10m/s in 30s. How far had the train gone before it's speed was reduced from 30m/s to 20 m/s? Homework Equations D= Vi times T + at(squared) divide it by 2 The Attempt at a Solution None yet. Please help me...

Hey I have a quick question. If the length of an inclined plane, a little ball is rolling down, measures 25 meters, and its acceleration is 2 meters every second, the velocity at one second would be 2 meters a second. The velocity at 2 seconds, would be 4 meters per second, the velocity at 3 sec...

[SOLVED] Accelerated Motion Problem--easy but I NEED HELP on it! Is NOT an example of accelerated motion? e. Horizontal component of projectile motion

Ok, I'm currently trying to do an experiment of a cart coasting down an incline plane using ticker tape. The ticker tape is set up so that the space between each dot represents 0.02 s. That being said, between every 5th dot would represent 0.1 second. I know that the point of this experiment...

I've read some theories (for example Mach's principle of distant stars being the basis) of why we feel accelerated motion. What are modern sciences thoughts on this? Couldn't it simply be collisions of particles against nerves just like the seat of a car pushes up against you in an...

I would need a pointer to a mainstream treatment of the general relativistic Doppler effect when source and receiver are accelerated wrt each other. Book/paper/wiki . No crank papers , please (i.e. no Apeiron and such). Thank you.

Please carefully consider the following two experiments: Experiment 1 In flat space-time, two completely identical small test probes with built-in rockets and computerized navigation equipment separated by an initial distance l accelerate with a constant proper acceleration a for a proper...

Hey, this question has been drivning me crazy. I've tried making a velocity vs. time graph to help me sort out the different velocities, accelerations, displacements but no matter what i try or what type of equation i try, i just seem to be in a dead end. Here's the question: A car...

Hey I was wondering if anyone can point me in the right direction of where to begin in this problem: An apartment-dweller is looking out of the window if her living room. The glass area of the window measures 2.00m from the top and bottom. A freely-falling computer monitor suddenly drops past...

I like to understand better how relativity treats accelerated motion. 1.How does SR handle it? I only have a formula in front of me that says how two inertial systems relate their observations of an accelerated object with each other. But what does SR say about accelerated observers...

im stuck on this one: a person standing on an overpass above a roadway wishes to drop something onto a truck. the truck starts from rest and accelerates at half the speed of gravity from a position 100 m from the point of impact. the overpass is 30 m above the truck. how long after the truck...

i need some help understanding uniformly accelerated motion, i am taking physics for the first time and i don't understand how to solve these problems. i have a bunch of formulas and i am supposed to manipulate them in order to solve problems but i don't understand it. can anyone suggest...

Uniformly accelerated motion-- a weird kangaroo prob Ok, I have this simple Question: A kangaroo can jump straight up 2.5 m -- what is its takeoff speed? How can I solve that given just one variable. Well, I know that Vi=0, right? Also, if you anyone can help me try to solve this one...