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Hi I need help with these questions thank you.
A teacher walks around the room while students are taking a test. If he walks 8 m North, 6 m East, 8 m South, and 6 m West, what is his displacement?

28 m
0 m
22 m

A dog runs across the room at a constant speed. What is its acceleration?

0 m/s^2
-1 m/s^2
Not enough information

A car accelerates from rest to a speed of 18 m/s over a distance of 400 m. What is its acceleration?

3600 m/s^2
0.0225 m/s^2
0.405 m/s^2

A helicopter drops a bucket of water onto a forest fire from 38 meters above the blaze. How long does it take the water to fall and reach the flames?

744.8 s
2.74 s
7.76 s

A golf ball is hit horizontally from a 45 m tall building with a speed of 62.5 m/s. How far from the building does it land? (Hint: Find time first.)

573.8 m
20.6 m
189.4 m

How long will a soccer ball that is kicked at 6 m/s at an angle of 27 degrees above the horizontal take to hit the ground downfield?

0.75 s
0.56 s
1.1 s

pls help

Sagot :

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