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VARVARA [1.3K]
3 years ago
7

The slope of a distance-versus-time graph shows an object's

Physics
1 answer:
Cerrena [4.2K]3 years ago
8 0
The answer is A, speed.
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A box weighs 25N. How much mass does it have?
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Explanation:

If box weight 25N on ground

MA=F

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A circular curve of radius 150 m is banked at an angle of 15 degrees. A 750-kg car negotiates the curve at 85.0 km/h without ski
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Answer: a) 7.1 * 10^3 N; b) -880 N directed out of the curve.

Explanation: In order to solve this problem we have to use the Newton laws, then we have the following:

Pcos 15°-N=0

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from the first we obtain N, the normal force

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Then to calculate the frictional force (f) we can use the second equation

f=P sin (15°) -m*ac where ac is the centripetal acceletarion which is equal to v^2/r

f= 750 *9.8 sin(15°)-750*(85*1000/3600)^2/150= -880 N

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