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bagirrra123 [75]
2 years ago
11

In the data table , distance is measured in meters and time is in seconds. Calculate the mans average velocity using the equatio

n (average velocity= total distance/total time.

Physics
1 answer:
Artist 52 [7]2 years ago
6 0

Answer:

3.626 m/s

Explanation:

v=d/t

1. -0.02/0 = 0 m/s

2. 0.86/0.2 = 4.3 m/s

3. 1.71/0.4 = 4.275 m/s

4. 2.54/0.6 = 4.23 m/s

5. 3.32/0.8 = 4.15 m/s

6. 4.08/1.0 = 4.08 m/s

7. 4.79/1.2 = 3.99 m/s

8. 5.48/1.4 = 3.91 m/s

9. 6.15/1.6 = 3.84 m/s

10. 6.76/1.8 = 3.76 m/s

11. 7.37/2.0 = 3.66 m/s

12. 7.92/2.2 = 3.6 m/s

13. 8.45/2.4 = 3.52 m/s

14. 8.96/2.6 = 3.45 m/s

the mean of these numbers is 3.626

his average velocity ks 3.626 m/s

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A curve of radius 78m is banked for design speed of 85km/h.If coeficient of static friction is 0.3[wet pavement]at what range of
maxonik [38]

Answer:

The speed of the car safely make the curve, V = 65.23 Km/h

Explanation:

Given,

The radius of the curve, r = 78 m

The designed speed of the curve, v = 85 km/h

                                                            = 23.61 m/s

The coefficient of static friction, μₓ = 0.3

The static friction of the curve is given by the relation,

                                       Fₓ = μₓ η

The acceleration responsible for the static friction

                                      aₓ  = μₓ x g

Substituting the values in the equation

                                      aₓ = 0.3 x 9.8

                                           = 2.94 m/s²

The designed acceleration of the curve

                                        a₀ = v²/r

                                           = 23.61²/78

                                          = 7.15  m/s²

The acceleration supported by the static friction, aₓ can be subtracted from the designed acceleration of the curve.

Therefore the net acceleration,

                                         a  = a₀ - aₓ

                                             = 7.15 - 2.94

                                              = 4.21 m/s²

The centripetal velocity associated with this acceleration is

                                           a = V²/r

∴                                         V² = a x r

                                          V = √(a x r)

                                              =√ (4.21 x 78)

                                               = 18.12 m/s      

                                               = 65.23 Km/h

Hence, the speed required by the car to safely make the curve is, V = 65.23 Km/h                                

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2 years ago
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