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3 years ago

11

When you ride a roller coaster that makes sharp turns ,you feel yourself being pushed to one side . Use Newton's first law of mo

tion to explain this phenomenon

1 answer:

arlik [135]3 years ago

6 0

Inertia is the resistance of any physical object to any change in its velocity. When you feel pushed, you feel a change in direction.

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The main strength and weakness of traditional economy?

olasank [31]

the main strenght is each person has a job and the weekness is they are poor

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3 years ago

Two friends are walking on a hot beach on a hot summer day. one friend reports her feet are becoming hot she needs her sandals.

nata0808 [166]

Answer:

conduction

Explanation:

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3 years ago

An object is launched with an initial speed of 30 m/s at an angle of 60° above the horizontal . What is the maximum height reach

matrenka [14]

Answer:

H = 34.43 m

Explanation:

Given that,

Initial speed of the object, u = 30 m/s

The angle of projection, $\theta=60^{\circ}$

We need to find the maximum height reached by the object. Let it is H. Using the formula for maximum height reached by the projectile.

$H=\dfrac{u^2\sin^2\theta}{2g}\\\\H=\dfrac{(30)^2\times \sin^2(60)}{2\times 9.8}\\\\H=34.43\ m$

So, the maximum height reached by the object is 34.43 m.

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3 years ago

During a workout, the football players at State U ran up the stadium stairs in 61 s. The stairs are 130 m long and inclined at a

NeTakaya

Answer:

P = 1097 Watt

Explanation:

given,

length of stairs, L = 130 m

inclination with horizontal,θ = 30°

mass of the football player = 105 Kg

time = 61 s

we know,

$Power = \dfrac{work}{time}$

Work = change in Potential energy

h = L sin 30°

h = 130 x 0.5

h = 65 m

W = m g h

W = 105 x 9.8 x 65

W = 66885 J

now,

$P = \dfrac{66885}{61}$

P = 1097 Watt

hence, the power output on the way is 1097 W

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3 years ago

9. What is the magnitude of the velocity of a 25 kilogram mass that is moving with a

Ganezh [65]

Answer:

4

Explanation:

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3 years ago