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1. ### i need help in physics?

angular momentum L = m*v*r 4.5 kg·m²/s = 0.25kg * 3.5m/s * r r = 5.1 m

1 Answers · Science & Mathematics · 12/01/2021

2. ### a 895-kg freight car coasts at 3.1/ sec . A crane drops a 365-kg junk car into the freight car. What will be the freight car’s new speed?

is that 3.1 m/s ? conservation of momentum initial momentum = 895•3.1 final momentum = (895+365)V set them equal and solve for V V = 895•3.1 / (895+365) = 2.20 m/s

1 Answers · Science & Mathematics · 12/01/2021

3. ### physics hw help?

conservation of momentum 0.20(0.24) + 0.42(0.45) = (0.20 + 0.42)v v = 0.382258... ≈ 0.38 m/s Please remember to select a Favorite Answer from among your results.

1 Answers · Science & Mathematics · 12/01/2021

4. ### help with physics please?

Conservation of momentum Initial momentum of skater and ball is zero 0 = 6.0(-3.0) + 78v v = 0.23076... ≈ 0.23 m/s Please remember to select a Favorite Answer from among your results.

1 Answers · Science & Mathematics · 12/01/2021

5. ### Physics Help??????

... in units of s.  t = √ 2h / g = √ 2*1.1 / 9.81 = 0.474 sec   b. What is the kinetic energy KE of the rock just before it...

1 Answers · Science & Mathematics · 10/01/2021

6. ### Physics????????????????????

Vo^2 = 2*a*L a = Vo^2/2L = 77.6^2/3.5 = 1721 m/ sec ^2 accel. a = F / m ball mass m = F/a = 13.3/1.72 = 7.73 kg  ....no matter the shooting angle

3 Answers · Science & Mathematics · 10/01/2021

7. ### When a force of 6 N is applied to a block of 2 kg mass, it moves along a horizontal surface at constant speed.?

...what is the acceleration?   a = (F'-FF)/m = (10-6)/2 = 2.0 m/ sec ^2  (iii) What is the speed V, if it accelerates from...

1 Answers · Science & Mathematics · 09/01/2021

8. ### physics help need done soon please ?

...g is 9.8 m/s ^2  landing time t = √ 2h/g = √ 2.2/9.8 = 0.474 sec   block speed Vb = d/t = 1.7/0.474 = 3.59 m/ sec   conservation of momentum shall...

1 Answers · Science & Mathematics · 09/01/2021

9. ### The Rioters were after Mike Pence. They were upset he upheld Constitution. Do you think he'd be alive still if it wasn't for Secret Service?

....  There are also reports of Trump's new Sec Def hobbling the DC National Guard ...

1 Answers · Politics & Government · 08/01/2021

10. ### Should the capitol have better security ?

There may be more to this story.  Was Trump's Sec Def easing rioters' access?  "The Pentagon...

5 Answers · Politics & Government · 08/01/2021