## Search found 38 matches

- Mon Nov 19, 2018 7:38 pm
- Forum: Physics Help
- Topic: Given a cart and spring on incline, how do I find the period of oscillation?
- Replies:
**4** - Views:
**328**

### Re: Given a cart and spring on incline, how do I find the period of oscillation?

Hi roxieqk16, I don't understand your answer to the OP. For springs I can find the differential equation for a horizontal and vertical spring, but how can they be the same? The equations are m d^2x/dt^2 + k x = 0 m d^2x/dt^2 + k x + m g = 0 How can those give the same results whenthe equation is dif...

- Mon Oct 15, 2018 8:06 pm
- Forum: Physics Help
- Topic: Given a cart and spring on incline, how do I find the period of oscillation?
- Replies:
**4** - Views:
**328**

### Re: Given a cart and spring on incline, how do I find the period of oscillation?

Hi Turnnirl, hi I need a question answered I need help on b A cart of mass m is attached to a vertical spring of force constant k so that the spring stretches 20 cm. When the cart is set into oscillatory motion on the vertical spring, the period of the oscillation is 3 seconds. The cart is set on an...

- Mon Oct 08, 2018 5:23 pm
- Forum: Physics Help
- Topic: circular motion and centripetal force
- Replies:
**4** - Views:
**210**

### Re: circular motion and centripetal force

I divided by 6.28 to get the revs thn divided by 60 to get minutes is the right? i got 0.009 in revs/minute Almost! dividing by 6.28 is correct (because we have to divide by 2 pi), but to convert seconds to minutes we have to multiply by 60, not divide. That's because the time unit of seconds is be...

- Mon Oct 08, 2018 4:10 pm
- Forum: Physics Help
- Topic: circular motion and centripetal force
- Replies:
**4** - Views:
**210**

### Re: circular motion and centripetal force

HI Brentzoom, centripetal acceleration correspond to acceleration which points in, i.e. a=v^2/r In training, military piots are given various tests. one test puts them in a seat on the end of a long arm of length 5m which is then spun around ar a high speed. at top speed the pilot will experience a ...

- Mon Oct 01, 2018 2:19 pm
- Forum: Physics Help
- Topic: What is the equation for displacement of a jet?
- Replies:
**3** - Views:
**175**

### Re: What is the equation for displacement of a jet?

Yes, that will work! If you plug in your values, that should give you the final answer. What do you get for that?RusselMank wrote: ↑Mon Oct 01, 2018 2:16 pmIt's hard to guess, but I saw this one

d = 1/2*(vo+vf)*t

Is that right?

- Mon Oct 01, 2018 1:53 pm
- Forum: Physics Help
- Topic: What is the equation for displacement of a jet?
- Replies:
**3** - Views:
**175**

### Re: What is the equation for displacement of a jet?

Hi RusselMank, The statement of the problem is below. The first thing is they give us the initial velocity at the start time, and it is assumed that it accelerates at a constant rate. There is no air resistance,and the jet ends up going at 435m/s, which actually is the fnal velocity of the jet. The ...

- Mon Sep 17, 2018 2:14 pm
- Forum: Physics Help
- Topic: triple x and y components?
- Replies:
**3** - Views:
**198**

### Re: triple x and y components?

Hi GloriaVipsy , Ihad the same problem with different numbers. magnitude = 5 and angle is 30. I started by calculating the components, and tripled them. I then used the Pythagorean theorem. I got an answer of 15. Will it alwys just triple the total magntidue? Yes, that's right! If you multiply the c...

- Wed Sep 12, 2018 5:58 pm
- Forum: Physics Help
- Topic: the current through a light bulb is constant: true or false?
- Replies:
**1** - Views:
**157**

### Re: the current through a light bulb is constant: true or false?

Hi ShylaMal, Is the current in a light bulb greater immediately after it is turned on aor a few minutes later? explain your answer. I thought the current was the same because V=IR and V and R are constants so I must be constant. is that correct? it was marked wrong In this case, we cannot assume tha...

- Tue Sep 11, 2018 3:01 pm
- Forum: Physics Help
- Topic: Centripetal acceleration on a airplane in a circle
- Replies:
**4** - Views:
**187**

### Re: Centripetal acceleration on a airplane in a circle

Hi BiancaTex, Hey, how do you know if the a is centripetal or not? I tried a=v^2/r for some circular motion problem and get it wrong because there is a tangential as well. This doesn't make any sense, how can you sometimes have it and sometimes not? I know this is likely meaning something easy but I...

- Mon Sep 10, 2018 12:22 pm
- Forum: Physics Help
- Topic: Projectile Motion Kinematics
- Replies:
**4** - Views:
**195**

### Re: Projectile Motion Kinematics

Hi GloryCob, The problem statement is In laboratory situations, a projectile’s range can be used to determine its speed. To see how this is done, suppose a ball rolls off a horizontal table and lands 1.2 m out from the edge of the table. If the tabletop is 75cm above the floor, determine the time th...