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Vedmedyk [2.9K]
2 years ago
9

7. A child pulls a sled up a snow-covered hill. The child does 360 J of

Physics
2 answers:
Arlecino [84]2 years ago
8 0

Answer:

The child fell off and died.

Aleksandr-060686 [28]2 years ago
5 0

Answer:

.6 m

Explanation:

My friend told me

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What is a circuit. .
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A ball is at rest at the top of a hill until a boy kicked it with his foot. What is the force that causes motion in this scenari
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2 years ago
A particle moves along a straight line. Its position at any instant is given by x = 32t− 38t^3/3 where x is in metre and t in se
Rudik [331]

Answer:

The acceleration of the object is -69.78 m/s²

Explanation:

Given;

postion of the particle:

x = 32t - 38\frac{t^3}{3} \\\\

The velocity of the particle is calculated as the change in the position of the  particle with time;

v = \frac{dx}{dt} = 32 - 38t^2\\\\when \ the \ particle \ is \ at \ rest, \ v = 0\\\\32-38t^2 = 0\\\\38t^2 = 32\\\\t^2 = \frac{32}{38} \\\\t = \sqrt{\frac{32}{38} } \\\\t = 0.918 \ s

Acceleration is the change in velocity with time;

a = \frac{dv}{dt} = -76t\\\\recall , \ t = 0.918 \ s\\\\a = -76(0.918)\\\\a = -69.78 \ m/s^2

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2 years ago
A magnetically soft material is placed in a strong magnetic feild. what is the most likely outcome?
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