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katen-ka-za [31]

2 years ago

15

calculate the kinetic energy of a car with a mass of 500kg traveling at a velocity of 10m/s^2 north. A) 2,500j B) 25,000j C) 50,

000j D) 100j

1 answer:

Arte-miy333 [17]2 years ago

8 0

The correct answer would be A) 2,500j

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An object at rest on a flat, horizontal surface explodes into two fragments, one seven times as massive as the other. the heavie

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By conservation of momentum,
Distance lighter fragment slide= 7*6.7=46.9m

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2 years ago

A hot–air balloon is moving at a speed of 10.0 meters/second in the +x–direction. The balloonist throws a brass ball in the +x–d

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Answer:

Option (D) is correct.

Explanation:

The balloon lands horizontally at a distance of 420 m from a point where it as released.

Velocity of air balloon along +X axis =10 m/s

velocity of ball=4 m/s along + X axis

the velocity of balloon gets added to the velocity of ball. So the resultant velocity of the balloon=10+4 = 14 m/s

time taken= 30 s

The distance traveled is given by d= v t

d= 14 (30)

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Thus the balloon lands horizontally at a distance of 420 m from a point where it as released.

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2 years ago

A 50 kg archer standing on frictionless ice shoots a 100g arrow at a speed of 100 m/s what uis the recoild pseed of the archer?

nexus9112 [7]

Answer:

v= 0.2 m/s

Explanation:

Given that

m₁ = 50 kg

m₂ = 100 g = 0.1 kg

u =10 0 m/s

If there is no any external force on the system then the total linear momentum of the system will be conserve.

Initial linear momentum = Final momentum

m₁u₁ + m₂ u₂ =m₂ v₂ +m₁v₁

50 x 0 + 0.1 x 100 = 50 v + 0

0+ 10 = 50 v

$v=\dfrac{10}{50}\ m/s$

v= 0.2 m/s

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2 years ago

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Answer: the correct options are

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Alfred Wegener, who is a German meteorologist, in 1912 came up with a hypothesis that the continents are slowly drifting the earth. He called the movement continental drift.

The continents rest on massive slabs of rock called tectonic plates. The plates are always moving and interacting in a process called plate tectonics. In recent studies, through the science of plate tectonics, we where able to understand the mechanism through which continental drift occurs. The mechanism includes:

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3 years ago

Which of the following is a characteristic of an ionic compound?

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It is made of a metal and nonmetal.

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3 years ago

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