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3 years ago

A car travels from City A to City B to the north. It takes 4 hours, and the road mileage is 200 miles. The map shows that

Physics

1 answer:

ikadub [295]3 years ago

4 0

Answer:

The average speed would be the 200 miles/4 hours.

The average velocity would be the net displacement to the north at 80 miles/4 hrs = mph

Explanation:

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A 2.0kg rocket is traveling straight up. What force muse be applied to the rocket for it to move at a constant velocity?

Yuliya22 [10]

A equal force it always has to be equal

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4 years ago

Why does a bouncing ball rise to a lower height with each bounce? What energy conversion is taking place?

dsp73

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4 years ago

A 56-N net force acting on a cart accelerates it at a rate of 0.5 m/s/s. What is the mass of the cart

Anuta_ua [19.1K]

Answer:

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Explanation:

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3 years ago

When a .22-caliber rifle is fired, the expanding gas from the burning gunpowder creates a pressure behind the bullet. This press

mario62 [17]

Answer:

$1.18454\times 10^{-19}\ Pa$

Explanation:

t = Time taken

u = Initial velocity

v = Final velocity

s = Displacement

a = Acceleration

m = Mass of bullet = $2.6\times 10^{23}\ kg$

r = Radius of barrel = $2.8\times 10^{23}\ m$

$v^2-u^2=2as\\\Rightarrow a=\dfrac{v^2-u^2}{2s}\\\Rightarrow a=\dfrac{370^2-0^2}{2\times 0.61}\\\Rightarrow a=112213.11475\ m/s^2$

Pressure is given by

$P=\dfrac{F}{A}\\\Rightarrow P=\dfrac{ma}{\pi r^2}\\\Rightarrow P=\dfrac{2.6\times 10^{23}\times 112213.11475}{\pi (2.8\times 10^{23})^2}\\\Rightarrow P=1.18454\times 10^{-19}\ Pa$

The pressure of the expanding gas is $1.18454\times 10^{-19}\ Pa$

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3 years ago

Amazon has hired you to help design a new fleet of robots to work in their warehouse. You are trying to decide how powerful the

solmaris [256]

The minimum power is 490 W

Explanation:

The work that needs to be done by the robot in order to climb the shelves is equal to the gain in gravitational potential energy of the robot + object, therefore:

$W=mg \Delta h$