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mamaluj [8]
3 years ago
9

The minimum stopping distance of a car moving at 20.5 mi/h is 11.6 m. Under the same conditions (so that the maximum braking for

ce is the same), what is the minimum stopping distance for 50.2 mi/h?
Physics
1 answer:
pshichka [43]3 years ago
7 0

Answer:

d = 69 .57 meter

Explanation:

First case

Speed of car ( v )  = 20.5 mi/h  = 9.164  M/S

distance ( d ) = 11.6 meter                                       ( m = mass of the car )

Work done = 0.5 m v²  = 0.5 * 9.164² * m J  = 41.99 m J

Force = ( workdone /distance ) = ( 41.99 m / 11.6 )   =  3.619 m N

Second case

v = 50.2 mi/h = 22.44135 m/s

d = ?

Work done = 0.5 * 22.44² * m J = 251.7768 * m J

Since the braking force remains the same .

3.619 m = ( 251.7768 m / d )

d = 69 .57 meter

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A certain AM radio wave has a frequency of 1.12 x 100 Hz. Given that radio waves travel at
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An astronaut on a small planet wishes to measure the local value of g by timing pulses traveling down a wire which has a large o
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7 0
3 years ago
A circus tightrope walker weighing 800 N is standing in the middle of a 15 meter long cable stretched between two posts. The cab
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Answer:

T = 10010 N

Explanation:

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let's use trigonometry to find the angles

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4 0
3 years ago
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