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1. ### what are some characteristics of average speed?

If constant acceleration, average speed is the half the final speed. Average speed = (total distance traveled)/(time spent on a journey)

1 Answers · Science & Mathematics · 12/05/2011

2. ### what size frictional force would be needed for a car to go at a constant speed?

..., if the car is traveling at a constant speed, that means acceleration is zero, which means... zero, that means the frictional force would need to be exactly opposite to whatever other forces were...

1 Answers · Science & Mathematics · 09/11/2009

3. ### physics help..whats the min speed needed for stone to escape asteroid?

...force to the gravitational force: mv^2/r = GMm/r^2 We get the equation for the speed required to keep the stone in orbit: v = √GM/r Input the...

1 Answers · Science & Mathematics · 01/02/2011

4. ### why is there a need for the roller coaster car to increase its speed before entering a vertical loop?

...loop so that it doesn't fall. The increase in speed is there to compensate for frictional and potential energy losses as it...to the top. Technically, the car doesn't need to increase it's speed if it is going...

2 Answers · Science & Mathematics · 07/04/2011

5. ### what is the formula for speed and velocity?

If you have two of these, velocity(V) , Distance (S) and Time (T) You can find the third one with this formula V = S/T

4 Answers · Science & Mathematics · 12/10/2011

6. ### Find tension required for wave speed?? PLEASE NEED FOR FINAL EXAM ON MONDAY?

You need the linear density of the string: v = √[F/μ] μ = F₁/v₁²...

5 Answers · Science & Mathematics · 01/05/2010

7. ### Minimum speed of lead bullet needed for it to melt?

½mv² = mK(T-30) where K is the specific heat of lead and T is the melting temperature in °C Solve this eq for v

1 Answers · Science & Mathematics · 15/04/2008

8. ### what is the minimum initial speed of the pumpkin (just as it leaves the cannon) that is needed for it to reach this distance?

...g) sin 2 θ without using too much complicated math we can see that for any given Vo the max R will be when sin 2 θ is also...

1 Answers · Science & Mathematics · 27/05/2015

9. ### What is the minimum initial speed needed for a shot of 3187 ft?

... at θ = 45º where sin2θ = 1 and is d = v0²/g For a distance of 3187 ft, v0 = √[3187*32.17] = 320 ft/s This is 218...

3 Answers · Science & Mathematics · 17/03/2009

10. ### Formula for speed at impact, and acceleration of fall just before impact!?

There are five constant acceleration formulae, each one omits one of the variables. I suggest you learn them off by heart. v = u + at v^2 = u^2 + 2as s = ut + 0.5at^2 s = vt - 0.5at^2 s = (u + v)t / 2 u = initial velocity (m/s) v = final velocity (m/s) s = distance or...

4 Answers · Science & Mathematics · 03/10/2009