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algol [13]
3 years ago
15

A car moves from a position 50 m south of the library to a new position 250

Physics
1 answer:
Charra [1.4K]3 years ago
6 0

Answer:

A. 20 m/s north

Explanation:

The velocity of the car can be  calculated as:

v=\frac{d}{t}

where

d is the displacement

t is the time interval

Taking north as positive direction, the initial position of the car is

r_i = -50 m (south)

while the final position is

r_f = +250 m (north)

So, the displacement is

d=r_f -r_i = +250-(-50)=+300 m (north)

The time interval for the motion is

t = 15 s

So, the velocity of the car is

v=\frac{+300}{15}=+20 m/s (north)

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Explanation:

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work is done by the centripetal force on mass m during an angular displacement of 2π revolutions is given by:

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brainly.com/question/13031430

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