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3 years ago

How does increasing the starting height affect the final speed?

Physics

1 answer:

Lady bird [3.3K]3 years ago

7 0

Answer:

To investigate into how the height of a ramp affects the speed of a toy car rolled down a hill or slope because the higher the ramp the more Gravitational potential Energy (GPE), the more kinetic energy converted and the car will go faster. So the ramp increases, the velocity will also increase.

Explanation:

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If the car travels thrice(3times) around the track,who much is the total distance covered?

Katyanochek1 [597]

What does thrice mean not being mean or anything just saying so I can help with the question

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3 years ago

A hockey puck is sliding across a frozen pond with an initial speed of 9.5 m/s. It comes to rest after sliding a distance of 37.

Bond [772]

Answer:

<h3>The coefficient of kinetic friction between the puck and the ice is $\mu _{k} =$ 0.12</h3>

Explanation:

Given :

Initial speed $v_{o} = 9.5 \frac{m}{s}$

Displacement $x = 37.4$ m

From the kinematics equation,

$v^{2} - v^{2} _{o} = 2ax$

Where $v^{2} =$ final velocity, in our example it is zero ( $v =0$ ), $a =$ acceleration.

$a =- \frac{90.25}{ 2 \times 37.4}$

$a =- 1.21 \frac{m}{s^{2} }$

From the formula of friction,

$F =- \mu _{k } N$

Minus sign represent friction is oppose the motion

Where $N = mg$ ( normal reaction force )

$ma = -\mu _{k} m g$ ( ∵ $g = 9.8 \frac{m}{s^{2} }$ )

So coefficient of friction,

$\mu_{k} = \frac{1.21}{9.8}$

$\mu_{k} = 0.12$

Therefore, the coefficient of kinetic friction between the puck and the ice is $\mu _{k} =$ 0.12 .

4 0

3 years ago

A 2kg blob of putty moving at 4 m/s slams into a 6kg blob of putty at rest what is the speed of the to stick together blobs imme

andrew11 [14]

<h2>Answer</h2>

1m/s

<h2>Explanation</h2>

Given that:

<em>Mass of first blob = 2kg = m1</em>

<em>Velocity of blob = 4m/s = v1</em>

<em>Mass of second blob = 6kg = m2</em>

<em>Velocity of blob = 0m/s = v2</em>

<em />

To find:

<em>Final velocity = Vf</em>

<em />

<em>This question is of inelastic collision which is any collision between objects in which some energy is lost.</em>

<em />

<h3>Formula to be use:</h3><h2>(m1*v1) + (m2*V2) = Vf(m1 + m2)</h2>

(2*4) + (6*0) = Vf(2+6)

8 + 0 = Vf(8)

8 = Vf(8)

Vf = 1 m/s

So the speed of two blobs immediately after colliding = 1 m/s

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Svet_ta [14]

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Two identical space probes are orbiting Jupiter. Scientists determine that one of the space probes has a larger gravitational fo

galina1969 [7]

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If they're not identical, then the one with greater mass will feel more
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3 years ago

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