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Kaylis [27]
3 years ago
11

Freshly picked cucumbers are dropped into a bin from a height of 1.25 m above the bottom of the bin. Assuming that the bin is em

pty, how fast is a cucumber going when it hits the bottom of the bin? How much time does it take the cucumber to fall to the bottom of the bin?
Physics
1 answer:
postnew [5]3 years ago
8 0

Answer:

a) Vf = 4.95 m/s

b) t = 0.51s

Explanation:

take downwards as positive.

let Vf be the final velocity as the cucumber reach the bottom of the bin and Vi be the initial velocity of the cucumber when they dropped.

a ) from equations of motion:

(Vf)^2 = (vi)^2 +2g×(x - x0) ,

<em>since x0 = 0 m and Vi = 0 m/s.</em>

Vf = \sqrt{2g×(x)}  = \sqrt{2(9.8)×(1.25)} = 4.95 m/s, downwards

therefore, the cucumber will reach the bottom of the bin with a speed of 4.95 m/s.

b) from equations of motion:

Vf = Vi + g×t

Vi = 0 then:

t = Vf/g = 4.95/9.8 = 0.51 s

therefore, the cucumber will take 0.51 seconds to reach the bottom of the bin.

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erik [133]

Answer:

5.125

Explanation:

formula for speed is distance/time distance measured in metres

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2 years ago
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Two neutral metal spheres on wood stands are touching. A negatively charged rod is held directly above the top of the left spher
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Answer:

The right sphere is negatively charged, the left sphere is charged positively.

Explanation:

When a negatively charged rod is held above the top of left sphere, the rod will attract positive charges and repel negative charges. As the sphere are initially touching each other so positive charges from the both spheres will moves toward the rod. When we separate the spheres positive charges from right sphere have already moved toward the rod i.e. left sphere, creating a deficiency of positive charges in the right sphere and excessiveness of positive charges in left sphere , hence the right sphere will remain negatively charged and left sphere will remain positively charged.

4 0
3 years ago
A bowling ball with a mass of 8 kg is moving at a speed of 5 m/s. What is its<br> kinetic energy?
natali 33 [55]

Answer:

100J

Explanation:

Kinetic energy=1/2mv^2

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100J

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3 years ago
What does the galaxy made of ?​
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A lamp in a child's Halloween costume flashes based on an RC discharge of a capacitor through its resistance. The effective dura
pshichka [43]

Answer:

A. 0.199 J

B. 0.0663 C

C = 0.0221 F

D. 12.68 ohms

Explanation:

From the question:

time duration, t = 0.28 seconds

Average power, P = 0.71 W

Average voltage, V = 3 V

A) Energy is given as:

E = P * t

=> E = 0.71 * 0.28 = 0.199 J

B) Electrical energy is also given as:

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where q = charge

=> q = E / V

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C) Capacitance is given as charge over voltage:

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=> C = 0.0663 / 3 = 0.0221 F

D) Electrical power, P, can also be given as:

P = V^2 / R

where R = resistance

=> R = V^2 / P

R = 3^2 / 0.71 = 9 / 0.71 = 12.68 ohms

8 0
3 years ago
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