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NeX [460]
2 years ago
14

The equation for distance is d = st. If a car has a speed of 85 m/s and travels

Physics
1 answer:
Ludmilka [50]2 years ago
4 0

Answer:

D) 10 200 m

Explanation:

Speed is known as the rate of change of distance.

speed=\frac{distance}{time}

distance = speed * time

              = 85 ms⁻¹  * 120 s

              = 10200 m

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tigry1 [53]

Answer:

Explanation:

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The Frictional Energy can produce heat and light energy.

The sandpaper produces little shreds from the grit of the paper.

The shreds have KE (they move)

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2 years ago
What is the period? Blank seconds.
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8 0
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As capacitor was discharging, what did you observe about q on its plates and the motion of charges in the external circuit?
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8 0
1 year ago
Which statement best describes the energy changes that occur while a child is riding on a sled down a steep, snow-covered hill?
Tema [17]
<span>Kinetic energy increases and potential energy decreases.
</span>
6 0
3 years ago
Read 2 more answers
A 3.20 kg block starts at rest and slides a distance d down a frictionless β = 30.0 ◦ incline, where it runs into a spring with
Virty [35]

Answer:

Explanation:

a ) work done by gravitational force

= mg sinθ ( d + .21)

Potential energy stored in compressed spring

= 1/2 k x²

= .5 x 431 x ( .21 )²

= 9.5

According to conservation of energy

mg sinθ ( d + .21)  = 9.5

3.2 x 9.8 x sin 30( d + .21 ) = 9.5

d = 40 cm

b )

As long as mg sin30 is greater than kx ( restoring force ) , there will be acceleration in the block.

mg sin30 = kx

3.2 x 9.8 x .5 = 431 x

x =  3.63 cm

When there is compression of 3.63 cm in the spring , block will have maximum velocity. there after its speed will start decreasing.

7 0
3 years ago
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