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2 years ago

A man walks 30 m to the west, then 5 m to the east in 45 seconds.

Physics

1 answer:

katen-ka-za [31]2 years ago

8 0

Answer:

a. Displacement=30²+5²=925= 30.4m

b. Total distance=30m+5m=35m

c. V=s/t. = 30.4/45=0.6m/s

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Objects with masses of 135 kg and a 435 kg are separated by 0.500 m. Find the net gravitational force exerted by these objects o

IrinaVladis [17]

Answer:

The net gravitational force on the mass is $1.27\times 10^{-5}$

Explanation:

We have by Newton's law of gravity the force of attraction between masses $m_{1},m_{2}$

$F_{att}=G\frac{m_{1}m_{2}}{r^{2}}$

Applying vales we get

Force of attraction between 135 kg mass and 38 kg mass is

$F_{1}=6.67\times 10^{-11}\frac{135\times 38}{(0.25)^{2}}\\\\F_{1}=5.47\times 10^{-6}N$

Force of attraction between 435 kg mass and 38 kg mass is

$F_{2}=6.67\times 10^{-11}\frac{435\times 38}{(0.25)^{2}}\\\\F_{2}=1.76\times 10^{-5}N$

Thus the net force on mass 38.0 kg is $F_{2}-F_{1}=1.76\times 10^{-5}-5.47\times 10^{-6}\\\\F_{2}-F_{1}=1.27\times 10^{-5}$

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3 years ago

Which is a product of nuclear fusion?

Tju [1.3M]

Answer:

Creation of energy by joining the nuclei of two hydrogen atoms to form helium

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3 years ago

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You use 350 W of power to move a 7.0 N object 5 m.<br> How long did it take?

PilotLPTM [1.2K]

Answer:

0.1 second

Explanation:

We are given;

Power; P = 350 W

Force; F = 7 N

Distance; d = 5 m

Formula for power is;

P = workdone/time taken

Workdone = F × d

Thus;

350 = (7 × 5)/t

t = 35/350

t = 0.1 second

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3 years ago

What formula allows you to calculate the x component of a projectile?

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X-component of a projectile in flight =

(initial x-component)

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(initial horizontal component of velocity) x (flight time so far)

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Tomtit [17]

Answer:

Duration of the total trip

Explanation:

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where

$\Delta v$ is the change in velocity

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Acceleration is measured in meters per squared seconds, $m/s^2$ . Also, we should note that acceleration is a vector quantity, so in order to completely define acceleration we also need to specify the direction.

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4 years ago

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