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3 years ago

You walk 20 m north, then 5 meters south . What is your displacement?

Physics

1 answer:

chubhunter [2.5K]3 years ago

7 0

-- You start out.

-- You walk 20 m north.

-- Then you walk 5 m south.

-- Your displacement, relative to where you started from is <em>15 m north</em> .

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Explain How did Aristotle's inability to detect parallax lead him to propose a geocentric model of the solar system?

maxonik [38]

Answer:

Aristotle was blind, therefore could not see change in positions. Aristotle could see no detectable change in the positions of the stars, thought Earth was immovable.

Explanation:

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2 years ago

A 920-kg sports car collides into the rear end of a 2300-kg SUV stopped at a red light. The bumpers lock, the brakes are locked,

GrogVix [38]

Answer:21.45 m/s

Explanation:

Given

Mass of sport car=920 kg

Mass of SUV=2300 kg

distance to which both car skid is 2.4 m

coefficient of friction ( $\mu$ )=0.8

Let u be the initial velocity of both car at the starting of skidding

and they finally come to zero velocity

$v^2-u^2=2as$

$acceleration=\mu g=0.8\times 9.8=7.84 m/s^2$

s=2.4 m

$0-(u)^2=2\times (-7.84)\times 2.4$

u=6.13 m/s

so before colliding sport car must be travelling at a speed of

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v=21.45 m/s

7 0

3 years ago

A Chinese-American engineering student with traditional Asian values went to a college counselor because he was frustrated with

Vladimir79 [104]

Answer:

C. This is because he is asking him to disregard what his parents are saying and listen to his own values. This is not morally wrong, just the answer that works in that situation.

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3 years ago

A 1400 kg car moving +13.7 m/s makes an elastic collision with a 3200 kg truck, initially at rest. What is the velocity of the c

marishachu [46]

Answer:

-13.7m/s

Explanation:

If the car has a mass of 1400kg with a speed of +13.7m/s -> hits [email protected] rest and bounces with an elastic collision:

fm = -fm

Therefore, the speed the car will possess will be at a negative state.

= -13.7m/s

6 0