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PSYCHO15rus [73]
3 years ago
5

When does a bouncing ball have the least amount of kinetic energy?

Physics
2 answers:
Tasya [4]3 years ago
8 0
When it stops bouncing
Nuetrik [128]3 years ago
3 0

Answer:  win it no bouncing

Explanation:

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Answer: 79

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Which statement is true ?
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it depends only on the forces acting along the y axis I think

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Suppose that she pushes on the sphere tangent to its surface with a steady force of F = 75 N and that the pressured water provid
PolarNik [594]

Answer:

The time taken to rotate the sphere one time is,  t = 22 s

Explanation:

Given data,

The mass of the sphere, m = 8200 kg

The radius of the sphere, r = 90 cm

                                             = .9 m

The force applied by the girl, F = 75 N

The moment of inertia of the sphere is,

                            I = 2/5 mr²

                              = (2/5) 8200 x (.9)²

                              = 2657 kg·m²

The torque,

                            τ = I α

                             75 x 0.9 = 2657 x α

                              α = 0.0254 rad/s²

The angular displacement,

                            θ = ½αt²

                             2π =  ½ x 0.0254 rad/s² x t²

                                t = 22 s

Hence, the time taken to rotate the sphere one time is,  t = 22 s

8 0
3 years ago
How fast does a 500kg car need to drive to have 100,000 J of kinetic energy?
olchik [2.2K]

Answer:

The car must move at 2 m/s to have a Ke of 2,000 Joules.

Explanation:

Mark me pls

8 0
3 years ago
(I) A car slows down from 28 m????s to rest in a distance of 88 m. What was its acceleration, assumed constant?
Nataly [62]

Answer:

The  value is  a = -  4.45 m/s^2

Explanation:

From the question we are told that  

       The  initial speed is  u  =  28 \  m/s at a distance of  s_1  =  0 \ m

        The  final speed is  v  =  0 \  m/s    at a distance of  s_2 =  88 \  m

Generally  from the  kinematic equation we have that

       v^2  =  u^2  +2as

=>   a = \frac{v^2  -  u^2  }{ 2(s_2  -  s_1 )}

=>  a = \frac{0 -  28^2  }{ 2(88  -  0 )}

=>   a = -  4.45 m/s^2

The negative sign shows that it is decelerating

6 0
4 years ago
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