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2 years ago

Plz help, and show work

1 answer:

7 0

1.
Given:
S=-35m(downward), a=-9.8m/s2, u=0(start from rest)

Solution:
Formula: S=ut+(1/2)(a)(t^2)
-35m=(0)t+(1/2)(-9.8m/s)(t^2)
t^2= 7.142857
t= 2.67s

Answer: t=2.67s

2.
Given:
u=0(start from rest), t=20s, v=2m/s

Solution:
Formula: v=u+at
2m/s=0+a(20s)
a=0.1m/s^2

Answer: a=0.1m/s^2

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A loop rests in the plane of a page of textbook while a magnetic field is directed into the page. A clockwise current is induced

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Answer:

When the magnetic field is tilted so it is no longer perpendicular to the page.

When the magnetic field gets stronger.

When the size of the loop decreases.

Explanation:

According to the Faraday-Lenz law, the change of the magnetic flux over time causes an induced current, this flux is given by:

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3 years ago

Select the correct answer. Eli and Andy want to find out which of the two is stronger. Eli pushes a table with a force of 120 ne

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Acceleration of the table: B. 0.50 meters/second2

Explanation:

The problem can be solved by using Newton's second law of motion, which states that the net force acting on an object is the product of its mass and its acceleration. Mathematically:

$\sum F = ma$

where

$\sum F$ is the net force

m is the mass

a is the acceleration

For the table in this problem, we have:

$\sum F = 125 N - 120 N = 5 N$ is the net force on the table, because there are two forces of 125 N and 120 N acting in opposite directions

m = 10.0 kg is the mass of the table

Solving for a, we find the acceleration:

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2 years ago

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2 years ago

How to calculate final speed when the mass is 40,000kg height id 2.5km and 500,000N of force

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The final speed when the mass is 40,000kg height is 2.5km and 500,000N of force is 176.8 m / s

According to Newton's second law of motion,

F = m a

F = Force

m = Mass

a = Acceleration

m = 40000 kg

F = 500000 N

a = F / m

a = 500000 / 40000

a = 12.5 m / s²

a = v / t

v = d / t

v = Velocity

t = Time

d = Distance

d = 2.5 km = 2500 m

a = d / t²

12.5 = 2500 / t²

t² = 200

t = 14.14 s

v = 2500 / 14.14

v = 176.8 m / s

Therefore, the final speed is 176.8 m / s

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8 months ago

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3 years ago