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2 years ago

8

A car travels a distance of 200m in 20s. The engine of the car provides a driving force of 1000N. What is the power output of th

e engine?

1 answer:

sp2606 [1]2 years ago

6 0

Answer:

10000W

Explanation:

work=1000*200=200000

then

P=work/time=200000/20=10000W

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Independent practice

coldgirl [10]

Explanation:

formula: <u>Mass</u>

Density x volume

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10÷0.3=33.3 kg/m

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160÷0.1=1600 kg/m

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A wooden post has a volume of 0.025m³ and a mass of 20kg. Calculate its density in kg/m.

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20÷ 0.025=800 kg/m

Challenge: A rectangular concrete slab is 0.80m long, 0.60 m wide and 0.04m thick. Calculate its volume in m³.

Formula : Length x width x height = Volume

0.80 x 0.60 x 0.04 = 0.0192m³

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2 years ago

A car with a momentum (impulse) of 20,000 kg m/s collides with a wall and comes to a rest in 0.1 seconds. How much

Pani-rosa [81]

Answer:

» Force is 200,000 Newtons

Explanation:

${ \tt{force = \frac{impulse}{time} }} \\ \\ { \tt{force = \frac{20000}{0.1} }} \\ \\ { \tt{force = 200000 \: newtons}}$

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2 years ago

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A driver's foot presses with a steady force of 20N on a pedal in a car as shown.

azamat

Answer:

160N

Explanation:

Moments must be conserved - so.

$20 * 0.4 = F * 0.05$

$F=\frac{20*0.4}{0.05} = 160$

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3 years ago

A charge of 1.5 µC is placed on the plates of a parallel plate capacitor. The change in voltage across the plates is 36 V. How m

belka [17]

Answer:

Energy stored in the capacitor is $U=2.7\times 10^{-5}\ J$

Explanation:

It is given that,

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$U=\dfrac{1}{2}q\times V$

$U=\dfrac{1}{2}\times 1.5\times 10^{-6}\times 36$

U = 0.000027 J

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2 years ago

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Which best describes the energy of a sound wave as it travels through a medium

Solnce55 [7]

C. It depends on the medium

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3 years ago