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KATRIN_1 [288]
3 years ago
9

A paper weight is dropped from the roof of a block of multi story flats. Each storey being 3 metre high. It passes the ceiling o

f the 20th storeys at 30m/sec. If g = 10.0m/sec^2, How many storeys does the flat have.
Physics
1 answer:
docker41 [41]3 years ago
6 0
Use equations of motion to get the correct answer!
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What component of earth’s atmosphere exists entirely as a result of photosynthesis?
sashaice [31]

Answer:

brainly.com/question/11872573

Explanation:

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3 years ago
Read 2 more answers
An woman whose weight is 804 N stands on a long horizontal plank of wood 1.55 m from one end. The plank is uniform and is suppor
meriva

Answer:

Explanation:

There will be reaction force by  each vertical post on horizontal plank . Let it be R₁ and R₂ . R₁ is reaction force by the post nearer to woman

Taking torque of all forces about the end far away from the woman

Torque by reaction force = R₁ x 5.5

= 5.5 R₁ upwards

Torque by weight of woman in opposite direction , downwards

= - 804 x ( 5.5 - 1.55 )

= - 3175.8

Torque by weight of the plank in opposite direction , downwards .

= - 27 x 5.5 / 2

= - 74.25

Torque by R₂ will be zero as it passes through the point about which torque is being taken .

Total torque

= 5.5 R₁ - - 3175.8 - - 74.25  = 0 ( For equilibrium )

5.5 R₁ = 3250

R₁ = 590.9 N .

6 0
3 years ago
If a car accelerates from a speed of 10 m/s at an acceleration of 2 m/s2 for 3s.
Flauer [41]

Answer:

\boxed{\sf Final \ speed \ of \ the \ car = 16 \ m/s}

Given:

Initial speed (u) = 10 m/s

Acceleration (a) = 2 m/s²

Time taken (t) = 3s

To Find:

Final speed (v) of the car

Explanation:

From equation of motion we have:

\boxed{ \bold{v = u + at}}

By substituting value of u, a & t in the equation we get:

\sf \implies v = 10  + 2\times 3 \\  \\ \sf \implies v = 10 + 6 \\  \\ \sf \implies v = 16 \: m {s}^{ - 1}

\therefore

Final speed (v) of the car = 16 m/s

3 0
3 years ago
1. What are the characteristics of winds?
goldenfox [79]

Answer:

wind has two important things that is direction and speed.

8 0
3 years ago
What impulse occurs when a cart that is originally at rest experiences an average force of
frez [133]

Explanation:

What impulse occurs when a cart that is originally at rest experiences an average force of

N for 2.5 s? *

(10 Points)

25 N

25 Nm

25 Ns

25 kg m/s

5 0
3 years ago
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