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icang [17]
3 years ago
7

A 52.3 kg student is standing at rest on roller skates when another student throws a bag of 3.5 kg bag of sand. After the studen

t catches the bag they are pushed a distance of 2 meters in 1 second. What was the initial velocity of the sand bag being thrown?
Physics
1 answer:
IRINA_888 [86]3 years ago
4 0
PLEASE HELP, I need help too !! Please !

Explanation:
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Multiple choice please help :)
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To control whether an object is solid or incorporeal (things can pass through it) you would use the:
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Gamma radiation or Cathode rays

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How do scientist study the earth through plate tectonic plates and boundaries/
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3 years ago
A rock is thrown horizontally off a cliff with an initial speed of 3 m/s. The initial position of the rock is 10 meters above th
Valentin [98]

Answer:

<em>1.43 s.</em>

Explanation:

Using one of the equations of motion,

S = ut + 1/2gt².......................... Equation 1

Where S = height of the cliff, u = initial velocity, t = time, g = acceleration due to gravity.

<em>Note: When the rock begins to fall from the maximum height, u = 0 m/s, g = positive</em>

<em>Given: S = 10 m, u = 0 m/s</em>

<em>Constant: g = 9.8 m/s²</em>

<em>Substituting these values into equation,</em>

<em>10 = 0(t) + 1/2(9.8)(t²)</em>

<em>10 = 0 + 4.9t²</em>

<em>t² = 10/4.9</em>

<em>t² = 100/49</em>

<em>t = √(100/49)</em>

<em>t = 10/7</em>

<em>t = 1.43 s.</em>

<em>Thus the rock spend 1.43 s in air</em>

3 0
3 years ago
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