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Juliette [100K]
3 years ago
7

Maggie participated in a race. She ran 100 meters west and then turned back and ran to the starting line to complete the race. M

aggie covered this entire distance in 40 seconds. What are her average speed and average velocity?
Physics
1 answer:
earnstyle [38]3 years ago
3 0
Her total distance was 200 meters, since she ran 100 meters west and the same 100 meters back. This gives an average speed of 200 m / 40 s = 5 m/s.

However, her displacement was 0, since she ended at the same place she began, therefore, her average velocity is 0 / 40 s = 0.
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PART a)

here when stone is dropped there is only gravitational force on it

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Part b)

Now from kinematics equation we will have

y = v_i t + \frac{1}{2} at^2

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y = 25 m

so from above equation

25 = 0 + \frac{1}{2}(9.8 )t^2

t = 2.26 s

Part c)

If we throw the rock horizontally by speed 20 m/s

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Part D)

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PART E)

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