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igomit [66]
4 years ago
8

Which is an example of a screw? Lightbulb,ladder,screwdriver,flag pole

Physics
1 answer:
Andrei [34K]4 years ago
4 0

screwdriver :)

hope you'll give a good review!

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A 75 Kg skateboarder is riding downhill, exerting 25 N. What is their acceleration?
mylen [45]

Answer:

a=0.33\frac{m}{s^2}

Explanation:

Hello.

In this case, since the force is defined in terms of the mass and acceleration as follows:

F=ma

Given the force and the mass, we can compute the acceleration as shown below:

a=\frac{F}{m}=\frac{25N}{75kg}=\frac{25kg\frac{m}{s^2} }{75kg}\\   \\a=0.33\frac{m}{s^2}

Best regards.

8 0
4 years ago
The chimney of an oil lamp cracks when touched with rhe brade of cold knife?why<br>​
Bezzdna [24]

Answer:

The extreme difference between the hot chimney and the cold knife makes the chimney expand and contract so quickly it cracks.

Explanation:

Hope this helped!

7 0
3 years ago
Read 2 more answers
Determine the momentum of a helium atom (m = 6.696 x 10-27 kg) if the atom is traveling at 1.03% of the speed of light.
rjkz [21]
Are there any options you can choose from?
7 0
4 years ago
Which type of pressure system is shown by this symbol and what type of weather does it bring?
julsineya [31]

Answer:

Low pressure bringing rainy or stormy weather

Explanation:

A low pressure system is represented by a red L and warm and moist air will be combined and bring stormy weather and high winds.

Hope this helps

8 0
3 years ago
Read 2 more answers
Imagine that I have a ping-pong ball and a bowling ball resting on the floor of our classroom. I go up to the bowling ball and g
MatroZZZ [7]

Answer:

the speed and aceleration of the ping pong ball is greater than that of the bowling ball.

Explanation:

We can analyze this exercise from several points of view, if we use Newton's second law

Bowling ball

           F = M a₁

pingpongg ball

           F = m a₂

as the forces the same

          M a₁ = m a₂

          a₂ = \frac{M}{m} a₁

Since the mass of the bowling ball is much greater than the ping pong ball,

          a₂ »a₁

so the acceleration of the ping pong ball is much greater than the acceleration of the bowling ball.

If we use the relationship of momentum and momentum, assuming that the time for the two cases is the same and that both start from rest

Bowling ball

           I = F t = Δp

           I = M (v₁ - v₀)

Ping pong ball

           I = F t = Δp

           I = m (v₂ -v₀)

the impulse itself

          M v₁ = m v₂

          v₂ = \frac{M }{ m} v₁

so we conclude that the speed of the ping pong ball is much greater than the speed of the bowling ball.

In conclusion the speed and aceleration of the ping pong ball is greater than that of the bowling ball.

4 0
3 years ago
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